How I Hacked Pokémon Emerald to make Pokémon walk with you

I created a hack of Pokémon Emerald that allows Pokémon to follow behind the player in the overworld. I did this by using the C disassembly created by the people at PRET. By importing all the sprites Gen I - Gen III from Pokémon HeartGold and SoulSilver into this game I hijacked a certain already existing sprite and using the animation frames I added (recolored with a special process to use the Gen III palettes) let the Pokémon walk behind the player in the overworld. In the video I go over the process and discuss aspects of GBA programming, certain GBA graphics modes and sprite palettes.

Try Pokémon Emerald Ambulation and Emerald Chaos Ambulation for yourself at:
https://notin.tokyo/pokemon

Also available at:
https://www.romhacking.net/hacks/7266/
https://www.romhacking.net/hacks/7267/

How to apply the patch:
   • How to Appy Game Hack Patch IPS Files  

In Pokémon Emerald Chaos Ambulation all Pokémon Battles and Encounters are randomly chosen from the 386 Pokémon but are at the same level as the original Pokémon would be. For example, a level 5 Ralts could become any Pokémon at that level, with all the associated moves of that new Pokémon.

Any artists interested in creating art for Lugia, Ho-oh or updating the exisintg animations for the three Hoenn legendary Pokémon, please check out the existing artwork at: https://bit.ly/3TaY8TA
Any submissions should be emailed to [email protected]

Sources:

Pret Disassembly
https://github.com/pret/pokeemerald

Bug Reporting Form
https://forms.gle/C8F1nVguNavk8CqJ7

This hack should be fully compatible with existing save files, so if you have a .sav file on an emulator then your game, after being patched, should continue to function as normal.


gameboy advance cartridge by Braden Stranks,
Gameboy Advance by Billy Sweetman,
and folder by BlackActurus from the Noun Project