The Ultimate Guide for Pokemon Theta Emerald EX

pokemon theta emerald ex

Creator: LCCoolJ95

Progress: Fully released in 2016

Platform: Game Boy Advance

Hack of: Pokemon Emerald

Pokemon Theta Emerald EX is a Game Boy Advance rom hack of Pokemon Emerald. This game has a lot of new features and additions from later generations that make the basic Pokemon Emerald harder and more fun for the average Pokemon player.

As the name implies, Pokemon Theta Emerald EX is not a completely new Pokemon game. The story, characters, and base elements are still the same. But the additional features make for a very exciting game. You can even do a Nuzlocke on it (Trust me, it’s a lot of fun). 

Who is this game for?

This game is for you if you are an experienced and seasoned player looking for a new and exciting way to play Pokemon Emerald.

However, this game isn’t for you if you’re looking for a new Pokemon game with a new map, features, fakemon, etc. 


Pokemon Theta Emerald EX 3 Pokemon Theta Emerald EX 2

Pokemon Theta Emerald EX 1 Pokemon Theta Emerald EX

Features and additions

The most notable and exciting thing about Pokemon Theta Emerald EX is that almost every single Pokemon generation is present here. 

That’s right. All 721 Pokemon from Generations 1 to 6 are available in this game. All the Trainers and Gym Leaders use Pokemon from all six generations. 

And I have to say, the final result is pretty nice. The sprites and colors fit very well. Looks almost as if they were part of the original game.   

Physical/Special split

Yes, Pokemon Theta Emerald EX does have a physical/special split, allowing Pokémon to use moves from a wider variety of types. 

Fairy types

This game has Fairy typing on all intended Pokemon like Gardevoir, Clefairy, Jigglypuff, etc. 

Reusable TMs

You can use TMs infinitely here. Just like HMs. Felt nice not having to worry about using my one and only Earthquake TM. 

Modern repel system

If your repel runs out, you won’t have to look for one in your bag. The game will automatically ask if you would like to use another one. 

Deletable HMs

You can delete HM moves without having to go to a Move Deleter.

Mega evolution

One of the best things about this game is that it fully supports Mega Evolution. Every single Pokemon that can Mega Evolve in Generation 6, can Mega Evolve in this game as well. 

I honestly didn’t expect this feature to blend as well as it does in this game. It felt as if Mega Evolutions were a part of the original game all along. 

Extended items pocket

The Items pocket in the bag can hold 200+ items. Huzzah! Now you won’t have to regularly toss items to make some room. 


The game, although good, is not without its fair share of glitches. After all, no matter how good the game looks and works, it’s still a fan-made game. Some of the glitches I’ve found include:

  • A new Pokemon, replacing one of the original 386, appears on the Hall of Fame screen after you beat the game
  • Some Pokemon display a different colored icon if they level up outside of battle
  • Some new Pokemon display a different colored icon when selecting more than one Pokemon in a box
  • Losing TMs or HMs when going near the Battle Tent 
  • Game sometimes freezes up when: 
    • Entering a Pokemon Contest  
    • Touching the blackboard inside the Trainer School in Rustboro City
    • Teaching Hydro Pump, from the boy in Fallarbor Town, to one of your Pokemon
    • Double battling one of the trainers in Mauville City 

How to download 

You can download this Game Boy Advance rom hack by clicking on the following MediaFire link provided by the game creator himself: Pokemon Theta Emerald EX Download

The compressed file contains the patch of the game and a patcher application. 

All Pokemon locations

Worried about trying to look for your favorite Pokemon on a map that contains over 700+ Pokemons? Worry no more. Here’s a Google Sheet with all the wild Pokemons’ locations, levels, and encounter rates: Theta Emerald EX Pokemon Locations 

All Mega Stones locations

You can start using Mega Stones after obtaining the fifth gym badge. However, the stones are invisible and spread randomly throughout the Hoenn region. You’ll need an Itemfinder to start locating them. Sounds way more complicated than it needs to be? I understand. You can watch the video below to pick up all of the Mega Stones: 


All Arceus plates

Just like Mega Stones, Arceus Plates are invisible and spread randomly throughout the Hoenn region. You’ll need an Itemfinder to find all of them. Or you can just watch the video below:


All TM locations

It can get a bit annoying to keep track of all 100+ TMs in the game. Instead of exploring Hoenn’s every nook and cranny, you can just watch this helpful video instead:  


You can find popular TMs like Calm Mind at 9:15, Rain Dance at 10:29, Sunny Day at 5:54, Dragon Claw at 14:45, Double Team at 2:24, and Shadow Ball at 7:46.

All creation trio orb locations

The creator of the game is a bit of a trickster. Creation trio orbs are also invisible and spread throughout the region. 

Watch the video to save yourself from a world of pain:


And kudos to LHTN BR for uploading these videos. Pokemon fans all over thank you for your service. 

All legendary Pokemon locations

I couldn’t find a good video with all Legendary Pokemon locations (maybe I should make one myself?) so you’ll have to personally find your way around the locations mentioned below:  

Articuno: Shoal Cave

Zapdos: New Mauville (generator room)

Moltres: Mt. Chimney

Mewtwo: Training Cave F2

Mew: Faraway Island (ticket)

All three legendary beasts: Route 116 (must have Lugia and Ho-Oh in the team)

Ho-Oh and Lugia: Navel Rock (ticket)

Celebi: Battle Frontier 

Regirock: Desert Ruins

Regice: Island Cave (near Dewford Town)

Registeel: Ancient Tomb

Latias or Latios: One roaming and one ticket

Kyogre: Marine Cave

Groudon: Terra Cave

Rayquaza: Sky Pillar

Jirachi: Meteor Falls

Deoxys: Birth Island (ticket)

Uxie, Mesprit, and Azelf: Route 124 

Dialga and Palkia: Meteor Falls (must have Uxie, Mesprit, and Azelf in the team)

Heatran: Fiery Path

Regigigas: Sealed Chamber (must have Regirock, Regice, and Registeel in the team)

Giratina: Mt. Pyre (must have Dialga and Palkia in the team)

Cresselia: Route 129

Phione: Breed Manaphy

Manaphy: Mossdeep City (egg)

Darkrai: Mt. Pyre

Shaymin: Petalburg Woods

Arceus: Sky Pillar (must have Dialga, Palkia, and Giratina in the team)

Victini: Sootopolis City

Three Swords of Justice: Victory Road

Keldeo: Route 123 (must have three Swords of Justice in the team)

Tornadus and Thundurus: Route 119 (behind Weather Institute; must have Castform in the team)

Landorus: Mirage Tower (must have Tornadus and Thundurus in the team)

Reshiram and Zekrom: Sky Pillar

Kyurem: Shoal Cave

Meloetta: Lilycove City

Genesect: New Mauville (generator room)

Xerneas: Faraway Island (ticket)

Yveltal: Mt. Pyre

Zygarde: Altering Cave

Diancie: Granite Cave

Hoopa: Route 128

Volcanion: Scorched Slab

Source: Reddit


It should be noted that not all GBA emulators support cheat codes. For example, Action Replay cheats aren’t supported by OpenEmu for Mac. 

For Mac OS users who really want to use some cheat codes, I recommend installing Bluestacks and downloading My Boy.

Walk Through Walls

7881A409 E2026E0C

8E883EFF 92E9660D

Unlimited Rare Candies in PC


Master Balls in Mart

958D8046 A7151D70

8BB602F7 8CEB681A

Master Balls in PC

128898B6 EDA43037

Pokemon Nature Modifier

Instruction: Enter 6658C989 89518A0F + Pokemon nature code identifier.

Example: (Hardy)

6658C989 89518A0F

217A1A8B E666BC3F

Note: Remember to enter and activate the code before battling.

Hardy: 217A1A8B E666BC3F 

Lonely: CD72C719 F2831689  

Brave: EB200815 63938154

Adamant: C8CE1977 779F1AA5 

Naughty: 2AC59EBF 40C4F367 

Bold: 5E7363AA 5D262877 

Docile: 2C707820 9C67A3F0 

Relaxed: 471AA96A 79ECA891 

Impish: 4F71D6E0 699827D5

Lax: 2717EE59 7564BC55

Timid: 71296D0B D469AD70 

Hasty: A79D2EF2 F82F5AF7

Serious: A8510C52 65C50481

Jolly: 5769723D 1DA05C56

Naive: ED5B105D B88A30D8

Modest: CA12F7A9 56873493 

Mild: 31D9195E 5DF03DCE

Quiet: E7EC9FF0 70029AE9 

Bashful: 5C43DDAA 02D3FC98

Rash: 24775C3B A15419C7 

Calm: D090BDDA 1968867D

Gentle: 7B499E06 77185F5C

Sassy: EBA4E60F F5F19690

Careful: 5BFE17AB A5DC524C

Quirky: ADF48A64 04D2988F

Infinite Cash

D8BAE4D9 4864DCE5

A86CDBA5 19BA49B3


1C7B3231 B494738C

C051CCF6 975E8DA1

Catch a Trainer’s Pokemon

Note: In order to avoid catching a bad egg, press L+R before throwing a Poke Ball.

B6C5368A 08BE8FF4


E151C402 8A229A83

8E883EFF 92E9660D

Shiny Pokemon

F3A9A86D 4E2629B4

18452A7D DDE55BCC


Which exact rom version should I patch?

You should use the pre-patched rom from 2-27-17. It worked fine for me. Plus you won’t have to go through the patching process.

How to stop Gardevoir at Gym 7 from freezing my game?

This is a notorious problem within the game. Defeat that Gardevoir as fast as possible. As long as it stays on the field, your game can crash anytime.

How do you Mega Evolve in Pokemon Theta Emerald EX?

Here’s how:

  • Get a Mega Armlet from your Mom after defeating Norman
  • Find your Pokemon’s Mega Stone
  • Give the stone to your Pokemon
  • Press ‘Start’ during battle and use a move

How to evolve Kirlia into Gallade in Pokémon Theta Emerald EX?

Buy a Sun Stone from the woman next to the Pokemon Center in Mauville City. Use the Sun Stone on your Kirlia to evolve it into a Gallade. 

Where can I find the Blue Orb in Pokemon Theta Emerald EX?

I believe you can get it after catching Kyogre. 

How can I evolve Riolu in Pokemon Theta Emerald EX?

Same as usual. Raise its Friendship to a very high level. Give it a Soothe Bell if possible and don’t let it die in battle.  

How to get HM06 Rock Smash in Pokemon Theta Emerald EX?

Go to Mauville City and enter the house to the right of the Poke Mart. You can get it from the guy inside.

What is the difference between Pokemon Theta Emerald EX and Pokemon Theta Emerald Renev?

Pokemon Theta Emerald Renev is an overall improvement on Pokemon Theta Emerald EX. You can catch Pokemon from Sword/Shield. There are new Pokemon, new forms, new moves, new abilities, new items, new TMs, new areas, Mega/Primal Reversion, and lots of bug fixes.

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