Theta Emerald
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Theta Emerald


This is completely different from the regular Emerald game you are used to. However, it is different, in a very fun and cool way. Will you be able to catch all the 650 pokemons? Wild Pokemon Data will tell you where to catch all of it. Screen say is Emerald, it is not, it is Theta Emerald. Think of it as a super expansive pack for Emerald with a lot of new updates, changes, and features.


  • 650 Pokémon:  Every single one of them is catchable, either through an event, or in the wild. Not only that, but the Trainers, Gym Leaders, Evil Teams, Elite Four, and Champion have new Pokémon as well.
  • 100+ new moves: In order to compensate with the new Pokémon, there has been quite a few new moves added to game to add to everyone’s movesets. Some with new animations, and some with new effects.
  • Physical/Special Split: To make the game more current, a proper Physical/Special Split has been implemented to the game, including icons to denote each move.
  • “Have Specific Pokémon” Events: In order to encounter certain Pokémon, or more specifically, legendary Pokémon, you must have one to three Pokémon in your party in order for the event to work.
  • Fairy-type: Yes, the Fairy-type that has been shown in Pokémon X & Y, has been added to the game.
  • Updated Stats: Also, Pokémon that got their stats updated in X & Y now have them updated in this game.
  • New Evolution Methods: Pokémon that evolved through trade have a different means of evolving. Not only that, but because of the new Pokémon, completely new evolution methods have been added, like Map Name Evolution, Move Evolution, etc. That, and three new evolution items have been added. The Dawn Stone and Dusk Stone from Diamond and Pearl, and the Link Cable from Pokémon Mystery Dungeon.
  • Running Shoes Update: Like the newer generation games, you can use the running shoes to run inside of buildings.
  • Reusable TMs: Introduced in Pokémon Black & White, TMs can be used as many times as you like.
  • Egg Hatching Level: The levels of eggs that hatch are now at Level 1, just like in the newer games.
  • Catch EXP: A mechanic introduced in X & Y, now when you capture a Pokémon, your Pokémon will gain EXP.
  • De-capitalization: NO MORE OF THIS. Maybe a few spots, but I’ll fix them as time goes on.

mamamama: Emerald ROM Base in the Resource Thread
SBird: His concept of extending Emerald’s Pokédex
Chaos Rush: Sprites, his translated tutorial on expanding the Pokédex, and his Capture EXP ASM
Blue: Editing the Trainer’s Pokémon to have the new ones
karatekid: His Gen 3 Hacking Suite
Gamer2020: Pokémon Game Editor
itari: Reusable TMs and Check Pokémon ASM
Tlachtli: Physical/Special Icons
PurpleOrange: Give Pokémon Scripts
Percy: Fixing a very odd Pokédex glitch

How to Play

Only keyboard is required to play this game. Check out the controller button to see console-to-keyboard mapping. For example, "A" on the game console is mapped to "Z" Key on your keyboard. You can also change the default key-mapping to whatever you feel comfortable with.

Default Keyboard Mapping
Inside The Game Your Keyboard
A,B,L,R Button =[Z],[X],[A],[S]
PLAY,SELECT =[Enter],[Backspace]

Use the Save button to download the save code of Theta Emerald to your computer. Use the Upload button to select the save code from your PC to resume where you left off.

How to Play: