Pokemon Evo Yellow ROM

Pokemon Evo Yellow is a Gameboy ROM Hack by longlostsoldier based on Pokemon Yellow. It was last updated on November 14, 2022.

Description

This is a disassembly of Pokemon Yellow with bonus features; Pikachu now evolves, and all Pokemon now follow you. There are also branches with a following meowth and following eevee instead of Pikachu for a starter; these get updated less often. There is also now a minimalist version elsewhere, if you wanted JUST following, running, evolving Raichu, boy/girl choice, and 151 mons, you want the minimalist one. You do have my permission to use this for whatever you like.

Features

• Get any of the 151 Pokemon
• Eevee as a starter in the Eevee version, evolves to Sylveon via happiness (emotion sprite stays Eevee for now, still under development, open to the idea of different Eevee evolutions here instead). Same for Meowth in Meowth Version.
• Evolve Pikachu into Raichu. (Depending on happiness, emotion sprites will be Pikachu or Raichu; Pikachu can evolve by happiness now!*) Raichu will still follow, and will update its sprite.
• Move deletion of HMs
• New Emotion sprites, Raichu Faces (not all were used, grumpy ones kept Pikachu face due to evolving by happiness thing.)Play as girl or boy
• Cute Raichu graphics when you evolve Pikachu, Eevee and Meowth instead in those versions.
• Ride pokemon on a saddle
• Press B to run
• Can complete the Pokedex.
• Optional Level Adjuster Mode, trainers will have their levels matched to your party’s, although elite will be slightly higher. In this mode, you can also use surf on water without the move surf as soon as you want, so you can play the game in reverse order and fight Cinnabar first! (Seafoam is a bit of a pain, but you can get through it without Strength. Surf around Snorlax.)
• Refight gym leaders by talking to the gym guide (or in Celadon’s case, the guy right outside the gym) -Updates 3.5 and higher only-
• Day and night system
• Over 250 Pokemon, many Johto but also new Kanto evolutions have been added. All Eeveelutions available. Put a Pokemon in first slot to have it follow you.
• Legend Dogs roam after special randomized Fearow encounter, Mew roams after enough badges as a very rare encounter.
• Snag balls have been coded in the version 3.5 which can catch the last MON of a trainer. This is intended for use in the Meowth hack or possibly a Colosseum centric style hack with Eevee (you are free to use this as a base if you want for your own hack or steal any of the code).
• You can get a baby from the daycare if you leave a mon there. In older versions there were a few babymons, but I’m removing them for Celebi and Lugia.
• Charmander is available earlier from a bugcatcher in Viridian.
• More moves, like Crunch. Custom coding has been added for Sketch, Hidden Power and Mirror Move. (Although the sketch one is not in use and a bit buggy someone might like to nick it and change it?)
• Some moves have been tweaked; Wrap no longer traps you forever, nor do you get stuck raging. Roar can switch trainer parties out now (if a little terribly, as it displays the wrong text ‘trainer switched mons’ for enemies).
• More types, Dark, Steel, Fairy
• Slightly different TMs, to reflect the new types.
• Different kinds of shinies, get Pink, Blue, Black, Orange/red
• Hold items for Pokemon (very basic, use ‘give’ from item menu and ‘take’ from party menu): Berries and type-changing stones (Give moon stone to your Meowth to make it part dark type like an Alolan Meowth!), plus (latest version without patch only) Iron for Steel Type, Calcium Ground, Lemonade Fighting, Soda Pop for Poison, Max Revive for Ghost.
• Very basic megas functionality for Charizard, Venusaur, and Blastoise.
• New Areas, Mt. Silver and I am slowly adding the rest of Johto as well. Kanto is fully complete/playable on its own, of course.
• Slight difficulty curve adjustment in normal mode, with larger anime-inspired Teams for Gym Leaders, example: Brock has Vulpix, Misty has Corsola and Togekiss. Now in the latest version (not in patch 3.9!) Brock and Misty will ask you if you want easy or hard teams.
• OLDER versions (below 3.3) had type re-adjustments. In the new version, you can choose to adjust types by making your Pokemon hold special stones or a few other items!
• Uses Dannye’s Gen 2 Sprites version of the Yellow disassembly as a base; so, updated sprites. Exception is Yellow’s Pikachu sprite; that one I revamped myself.
• Steel, Dark, and Fairy Type added.
• Physical/Special Split.

Known Bugs

• IF you view a lot of TMs at once, sometimes the game crashes, so be sure to occasionally close your bag if after looking at a tm to use, it doesn’t reset you back to the top of your bag (Which was my quick fix to stop most of the crashing). This is the same bug that plagued the old move deleter and move rememberer: for some reason, the Yellow game really hates New Moves getting loaded a lot. I don’t know why it’s finicky about this when Red and Blue aren’t, but it might have something to do with the fact Missingno doesn’t work well in Yellow either – there are little changes here and there to the engine that mess with things.
  
• 9Minor Bugs: Some of the new moves don’t work /super/ well, so don’t expect them to be identical to their actual original versions; consider them more like half baked versions that just increase functionality a bit for fun, hah. Spikes, for instance, doesn’t actually work on actual switches, only on ‘switch on faint’, but enemies almost never actually do switching so that’s minor.

Useful Links

Pokecommunity

Github