Here is the logic. This is based off of a recreation of the game's code in C discovered by aphid, in the other answer to this question. As they said, the relevant code is mainly in /src/renewable_hidden_items.c. Obviously, this information is only valid if the people behind this project did a good job at recreating the game's code, but presumably they wouldn't have just made up an entire algorithm based on nothing. Certain, but not all, of the hidden items in the game are marked as "renewable". Each renewable item is marked as either "common", "uncommon", or "rare" (or several of the above, see below). All renewable hidden items are absent when the game starts. Every time you take a step, a step counter increments. When it reaches 1500, you enter what we'll call "respawn mode". For reference, Celadon city is about 50 tiles across (west to east). When in respawn mode, if you enter a zone that contains renewable hidden items, a global renewable item refresh is triggered. Your step counter is then reset to zero and you leave respawn mode. The "global renewable item refresh" algorithm is: Despawn all renewable hidden items in the entire game. For each zone in the game that contains renewable items, do the following. Generate a uniform random value from 0 to 99, inclusive. If the value is from 90 to 99, respawn all rare items in this zone. If the value is from 60 to 89, respawn all uncommon items in this zone. Otherwise, respawn all common items in this zone. A few points of emphasis, so there's no ambiguity: Yes, when you enter a zone with renewable items, it triggers a global refresh across the entire game, not just that zone. The refresh is only triggered when you enter a zone with renewable hidden items, not at any zone transition. Other zone transitions do not cause you to leave respawn mode and do not reset your step counter. The random values generated per zone during a refresh are all independent. However, the respawning of the items within a single zone are not, since they happen in batches: either all the rares, or all the uncommons, or all the commons. It really is "all the rares", not "all the rares and anything less rare". Getting a number above 90 does not respawn the uncommons or the commons. However, in some zones items are simultaneously of several rarity levels, to basically emulate this "rare and under" behavior. During a refresh, all items are despawned. This means once one spawns, if you don't go back and get it before the next respawn, there's a good chance it'll be gone by the time you get there. Finally, the list of all renewable items in the game: Zone Item(s) Rarity Route 20 Stardust Uncommon Route 21 (north) Pearl Uncommon Underground Path (Routes 5-6) Potion, Antidote, Paralyze Heal, Awakening, Burn Heal, Ice Heal Uncommon Ether Rare Underground Path (Routes 7-8) Potion, Antidote, Paralyze Heal, Awakening, Burn Heal, Ice Heal Uncommon Mount Moon (B1) Tiny Mushroom x3 Uncommon Tiny Mushroom x3 (the same ones), Big Mushroom x3 Rare Tanoby Ruins Heart Scale x4 Rare Berry Forest Razz, Nanab, Chesto, Pecha and Rawst berries Common Bluk, Wepear, Oran, Cheri, Aspear, Persim and Pinap berries Uncommon All uncommon berries, Lum berry Rare Treasure Beach Ultra Ball x2 Common All common, Stardust x2, Pearl x2 Uncommon All common, Star Piece, Big Pearl Rare Bond Bridge Pearl, Stardust Uncommon Four Island Ultra Ball Common Pearl Uncommon Memorial Pillar Big Pearl Rare Resort Gorgeous Stardust x2 Uncommon Nest Ball, Star Piece Rare Outcast Island Net ball, Star Piece Rare Green Path Ultra Ball Common Trainer Tower Pearl Uncommon Big Pearl Rare Note that because Berry Forest and Treasure Beach both have items of all three rarity levels, you're actually guaranteed to get items from them every 1500 steps. Also worth pointing out is the renewable Ether in the Underground Passage - I always thought Ethers were a finite resource in these games, but technically not (you just have to walk 15 thousand steps on average to get one).

According to a couple of guides (here and here), there is a benefit to throwing rocks and making the Pokémon angry. It functionality works opposite to throwing bait. When throwing bait, it makes the Pokémon more likely to stay, but makes it more difficult to catch. When throwing rocks, it makes the Pokémon more likely to run away, but makes it easier to catch.

The short answer is that what you're trying to do is not very likely to work at all, no matter how hard you try. After further research however, there is one thing you can try. What can you try with MyBoy? With the MyBoy emulator, save files are stored in the same folder as the ROM itself, and under the same name. For example, if you have a ROM named PokemonFireRed.gba, your save file must be named PokemonFireRed.sav. NOTE: This is NOT guaranteed to work with save files from every emulator when coming to MyBoy. Why won't it work for every emulator? The problem is that when applications are developed, their developers choose how to serialize data for later deserialization (save/load) in their application. While I may use binary serialization in my application, you may choose to simply create a text file to store JSON data in. What happens, is when you try to load a file in an application, it has a pre-defined algorithm that tells it how to interpret the data within it. If the file you're trying to load wasn't created in a way that enables that algorithm to interpret it, then it will fail to load. Let's visualize why this is a problem with a simple example. Let's say I've told you that when you save data you need to count from 1 to 10, and to load your data, you count from 10 to 1. You can think of this as your predefined set of instructions for saving and loading data. When I tell you to save your data, you count from 1 to 10: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 When I tell you to load your data, you count from 10 to 1. 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 Now, let's say my set of instructions for saving and loading data is to count from 50 to 100 and from 100 to 50 respectively, while only counting even numbers. You can see that when I load your data, I'm not counting the same way you are: 50, 52, 54, 56, 58, 60, ... 100, 98, 96, 94, 92, 90, ... With that in mind, your data isn't written out the same way as mine, therefore I cannot possibly load your data with my algorithm. Hope this helps!

The strategy is the same as with every other Pokémon... ... with the additional benefit that you can see Snorlax before challenging it, meaning that you may save before waking it up, just in case you mess up. Use a move that causes status conditions. Avoid Burn or Poison. While they improve your catch rate by 50%, they may also knock your target out. Sleep and Freeze double your catch rate, but can heal over time. Paralysis only improves your catch rate by 50%, but does not heal over time. Sleep heals after 2-5 turns, meaning it is guaranteed to heal after 5 turns. Freeze has a 20% chance of healing each turn, meaning that it is not guaranteed to heal, but is most likely to heal within 3 turns. Remember that a Pokémon can only be affected by one status condition at a time. Snorlax is carrying a Chesto Berry, so will immediately wake up when put to Sleep the first time. Snorlax also knows the move Rest, which it uses to heal itself by putting itself to Sleep. Use False Swipe, which guarantees to leave your target with 1 HP (unless the target is a Substitute). Use the best Pokéball you own (except maybe the Master Ball) to further improve your catch rate. If you don't have access to False Swipe, use whatever damaging move you do have, observe by how much the Pokémon's HP bar diminishes, and try to guess if using the same move again may knock the Pokémon out or not. If it would, use a weaker move. Repeat until you can no longer reduce the Pokémon's HP bar without knocking it out. Snorlax has a higher SP Def than regular Defense, so a Special Move will do less damage than a Physical Move, even if it has the same Power. For Fire Red and Leaf Green, Special Moves are all moves of the following types: Water Grass Fire Ice Electric Psychic Dragon Dark Remember that even if you failed to catch the Pokémon, you can just throw another Pokéball. Make sure you brought enough Pokéballs with you, just in case you're not being lucky. Be prepared for a long fight. Snorlax can Rest, which puts it to Sleep, but also fully heals it. If you can reduce its HP fast enough, you could try and catch it while it's still sleeping. Note that Rest can only be used 10 times. After that, you'll have to put Snorlax to Sleep yourself, or use a different status condition, like Paralysis. I recommend using the move Thunder Wave. Unlike moves like Hypnosis, which only has a 60% chance to put the opponent to sleep, Thunder Wave has 100% accuracy. Another good move is Yawn, which bypasses accuracy and is guaranteed to hit, but takes a full turn to take effect. Snorlax exclusively uses Physical Moves, so a Pokémon with high Defense is recommended.

I have managed to find a solution on how to trade pokemon. Prerequisites: BACK UP YOUR SAVE FILES FIRST! I have lost a few saves and sometimes the namespacing can change on a filename, so I would advise you save your files and find out where your saves are stored too so if you need to re name them afterwards, you can do. See this on how to get your IP address: https://www.hellotech.com/guide/for/h... Here are the key steps in the video: Before trading Download VBA - M from GitHub: https://github.com/visualboyadvance-m... Install the right version for your system, I have installed the 64 bit. Copy VBA - M to Applications folder Copy VBA - M in the Applications folder so that you have 2 VBAs, in there as shown in the video. Make sure that the games actively run in the background first before any trading, so that you can have both Fire Red and Leaf Green active at not frozen if not selected. Always use a keyboard to control the VBA and not a Bluetooth controller - if you use a Bluetooth controller, it also controls the game in the background which is not what you want, so have the keyboard set up first. Starting the trade Open both VBAs up, do not load the game, just open them Go to link, select link type as cable (not wireless) Start network link, set one as server with your IP address, and the other VBA as client. They should connect load the games Complete the trade Save the game afterward Check your saves and it should all be there I have also shown how to achieve this in a YouTube video -

You can use VBA Link. It's a different version from the regular VBA, it supports using up to 4 player connection. You will need to change your save data format, from .SAV to .SA1 (you can change it from .SA1 to .SA4, the number being the respective player). Once you do all the trading you need change your save file back to .SAV to keep playing in your regular emulator. I recommend to do a back up of your save file just in case things go wrong so you don't lose any progress.

Once my Pokémon were at Level 55-ish, I used the VS. Seeker on One Island, on Kindle Road, specifically against Crush Kin Mik and Kia, as well as Black Belts Hugh and Shea. They are right next to the hot spring room (Hugh and Shea are walking back and forth in front of it), allowing you to heal your Pokémon when needed. They give about 1000-1600 EXP per rematch. [source] Another good place is on Cycling Road. Koffing give a good amount of EXP as well and they are plentiful there. However, there are plenty of Pokémon that know Explosion, so you might want to keep on your toes. [source] Other options are available, as well. Some might not be available till after the E4, though (specifically those in Four Island and beyond).

I had the exact same problem when I could not find the TinyMushrooms in Mt. Moon after starting a new game and I could not find an explanation anywhere on the internet. I started asking questions around and someone finally helped me on the Pokecommunity. Here is the link, Basically it says that hidden items can be set dynamically, so there is an in-game event that sets the ability of picking them up. This event can really be anything, for example: Acquiring Cut or the second Gym Badge Traveling through Diglett Tunnel Maybe we can find out in the future for all hidden items. It baffles me that after almost 15 years (!!!) we still don't know when the hidden items spawn in two of the most played games on the Game Boy Advance. It's too ridiculous to be true, but, it is true. No one knows it.

Lugia and Ho-Oh can indeed be caught in Emerald, FireRed, and LeafGreen, but... it's not simple. Lugia and Ho-Oh are located on an island called Navel Rock. To go there, you need an item called the MysticTicket - a ticket for a ferry. This item is, however, not available in the game... What you have done is enabled Mystery Gift. Mystery Gift is a feature that lets you receive new things for the game via link cable from events - that is, real-world events held by Nintendo. However, events were timed and only available at certain locations, which was long ago now. The MysticTicket was distributed through some of these events. However, there still is one way to get it today... If you have a friend who has gotten the MysticTicket before, you can get the mystery gift from them via link cable. This is a long shot, of course - it's not simple to find someone who has it these days - but it's possible. Of course, you can also cheat - but that'd be too easy, wouldn't it?

The famous Red Gyardos is not specifically found in LeafGreen In Pokémon Gold, Silver, Crystal, HeartGold and SoulSilver, the red Gyarados is found in the Lake of Rage. The player has one chance to catch it and the incident triggers the battle against Team Rocket in the Team Rocket HQ in Mahogany Town. When captured or defeated, the red Gyarados drops a Red Scale. While this is the only chance to catch the Red Gyarados in the original games, it will respawn in the remakes after the player defeats Lance and the Elite Four, should the player fail to capture it. In Pokémon FireRed and LeafGreen, in the Rocket Warehouse located on Five Island, one of the computers displays information about induced evolution using electromagnetic waves, hinting at what occurs to other Gyarados in Generation II's Lake of Rage.

You can find underwater Pokemon by fishing. To do that you need a rod. There are three fishing rods that are given out throughout the course of each game, and each one is given out by a Fishing Brother. Old Rod: Vermilion City (from Fishing Guru) Good Rod: Fuchsia City (from Fishing Guru) Super Rod: Route 12 (from Silence Bridge Fishing Guru) Source Bulbapedia.

From the Serebii page, in FRLG, you get the Exp. Share from one of Oak's aides on Route 15, which means you can only get one. Theoretically, you could have a friend trade you an extra one, or use two cartridges to trade yourself multiple, but you cannot get multiple in the same game.

Yes, all three legendary birds (Articuno, Zapdos and Moltres) exist in Pokemon Leaf Green. If you get stuck, I've put their locations in the spoiler sections below. Mouse over them (tap on mobile) to view it. Articuno: Seafoam Islands (off Route 20) Moltres: Mt Ember, on 'One Island' in the Sevii Islands. Zapdos: Power Plant, down from the entrance to Rock Tunnel. It's also worth noting that Moltres' location differs from the original Red & Blue games.

The game itself has no lore pointing as to exactly what is possessing the Channelers. However, it seems likely that the incorporeal culprits are the Pokemon the Channelers are using to fight. It is already known that some Pokemon don't like being under a Trainer's control. It's a safe assumption that the Gastlies don't like being captured either, and are "lashing out" at the Channelers whose very job is to channel spirits. Similarly, another possible theory is that it's no particular Pokemon (or it's the Marowak Ghost in the tower). Either way, these Pokemon Spirits are/were riled up due to the recent influx of Team Rocket and their message of evil[citation-needed]. Alternatively, the Spirits could be protesting the treatment of kindly Mr. Fuji, who was captured by Team Rocket. Again, these Spirits would go through the Channelers who already open themselves up to our etherial battling pets. Although, both of the above answers are speculation and are just theories on the game. The game itself makes no direct reference to who/what the Channelers were possessed by, leaving it up to the Player to decide. Both possible explanations have their evidences and pitfalls, leading us to believe that there is no true answer.

Serebii lists Nidoran to be rare in FireRed, and Nidoran to be rare in LeafGreen.

You will need the National Dex to evolve Shuppet. Depending on the randomizer you use, you should have had an option to enable the national dex. The randomizer may include a tooltip on why that is important. In the Universal Pokemon Randomizer, this is found under the Misc Tweaks tab. This is supported by other users reporting being unable to evolve pokemon in the National Dex in threads on reddit or yahoo.

Simply enough, you're not supposed to leave Viridian City yet, as you haven't done everything you were asked to do. Go into the PokéMart and you'll be given a task to return to Pallet Town, then it should be simple from there.

Your EV training failed because Pokémon still receive EVs through the Exp. Share Leveling the Gastly up to level 50 using the Exp. Share caused it to still receive the EVs from whatever Pokémon were defeated, even if they don't participate in the battle. This calculator shows that your Attack and Speed stats are impossible for any IV values for the EV training you were attempting to do, with Attack being too high and Speed being too low, implying that Gastly received a number of Attack EVs during the leveling up process, and thus was maxed out on EVs when you attempted to start training Speed. You may also have ended up collecting a small number of EVs in other stats, depending on which Pokémon you battled.

There is no real way to 'bank' any of your spare money in any (main-series) Pokemon games as far as I am aware. Your best bet to not lose in the first place, which may mean over-training one or two Pokemon in your team so that they are sufficiently over-leveled for any challenging foe that crosses the rest of your team. And though it may be annoying to reset a gym's puzzles, leave before fighting the leader for the badge and heal up at a Pokecenter. The various trainers in a gym may not be particularly strong, but they can chip away at your preparedness for the leader, who often have at least one higher-leveled Pokemon that may be challenging. The only other things I can suggest is to invest in some escape ropes (to leave caves and such when your party is low on health), and to spend the extra cash on the best Potions available, Full Heals, Full Restores, and Revives. Buying these will help ensure future battles go better so that you don't lose. Also, hang on to all the Gold Nuggets and similar items that have no use beyond selling until you need the money. If you are planning on getting any Pokemon or TMs from the Celadon Game Corner, consider turning your cash into coins at the service desk ASAP.

As far as I can determine, in FireRed/LeafGreen there are only two repeatable sources of Rare Candies: The first involves having a having (multiple) Pokemon with the Pickup ability in your party. After a battle there is a 10% chance the pokemon with this ability will have picked something up (provided they aren't holding another item). When they pick something up there's a 5% chance that 'something' is a Rare Candy. Having a full team of 6 all having Pickup will increase your odds (simply by having more attempts per battle), but this can be a rather tedious way to grind Rare Candies. The second method involves traveling to Resort Gorgeous and showing Selphy the Pokemon she requests (after rescuing her from Lost Cave). If you manage to show her the Pokemon, you have a 1 in 6 chance of getting a Rare Candy. Neither of these options are all that quick, and your time would probably be better spent leveling Pokemon by sending them into battle against a high-leveled opponent (like the Elite 4), and then switching them out before they faint. The only other option to get many (infinite) Rare Candies on the cartridge AFAIK is to get a cheat device like Gameshark for your GBA.