Pokemon FireRed Delta ROM

Pokemon FireRed Delta is a GBA ROM Hack by Flame Insignia based on Pokemon Fire Red. It was last updated on May 07, 2026.

Description

A while ago, I thought it would be cool if I redrew all the Kanto Pokemon from scratch with new pixel art, heavily inspired by the concept of Delta Pokemon from Pokemon Insurgence. After months of laborious work drawing sprites, altering level up and TM moves, and editing every trainer in the game to reflect the new Pokemon, I sat on this ROM hack for over half a year. Now, I’m finally releasing it. Here’s all you need to know about Pokemon FireRed Delta.

Pokémon FireRed Delta is a difficulty/fakemon ROM hack with the goal of replacing 149 of the 151 gen 1 Pokémon with freshly designed Delta variants. Mew and Mewtwo are excluded from the redesign due to their postgame nature. All 149 of the Delta variants are accessible before defeating the Elite Four, and all trade evolutions have been replaced. “Pick one” type Pokémon, (e.g. starters, fossils) have been added to Altering Cave in the Sevii Islands postgame. The game is fully complete and playable to postgame.

Features

• A difficulty/fakemon ROM hack of Pokémon FireRed
• 149 out of 151 Gen 1 Pokémon redesigned as unique Delta variants
• Mew and Mewtwo remain unchanged due to their postgame nature
• All 149 Delta Pokémon are obtainable before the Elite Four
• Trade evolutions removed and replaced with alternative methods
• “Pick one” Pokémon (e.g. starters, fossils) available in Altering Cave (postgame)
• Fully complete and playable up to and including the postgame
• No modern QoL features to preserve the authentic Gen 3 experience
• Redesigned Pokémon include changes to abilities, base stats, typings, and movesets
• Dialog updated for many in-game NPCs
• Rebalanced moves (buffed HMs, adjusted power/PP to reflect later gens)
• Trainer teams updated, including Gym Leaders and the Elite Four
• Tweaked overworld color palettes for visual freshness

Known Bugs

• Some overworld animations (e.g. water reflection and walking through grass) are slightly visually glitched.
• The animation for throwing a Pokeball in battle is slightly visually glitched.
• The move Arm Thrust may sometimes cause the back sprite of its user to momentarily disappear. This may be true for other moves as well.
• For unknown reasons, which may be due to emulator incompatibility, opening the TM case has been found to crash the game in fringe cases. VisualBoyAdvance is the recommended emulator, and it works fine on my machine. 
• Some of the ghosts in Pokemon Tower have Shadow Tag. If you encounter one without having the Silph Scope, it will soft lock you. Make sure to pick up the Silph Scope before encountering anything there.

Changelog

V1.1.1

• Fixed a few missing apostrophes resulting from character incompatibility (if you find any more, please let me know).
• Fixed annoying animation inconsistency where grass retained its old palette (super easy fix, should’ve done it sooner lol)
• Added ability to run indoors (also super easy to do)
• Fixed oversight where Vulpix evolved via Fire Stone. Now evolves via Thunder Stone.

V1.1

• Corrected some text errors
• Fixed grass animation
• Added the ability to run indoors

Useful Links

Reddit

Pokecommunity

Documentation