Technical details would be important here. How do ROM hackers modify game data? They use tools like hex editors, disassemblers, and maybe custom software to change sprite data, move sets, and other game elements. I should explain that process briefly, without getting too technical for a general audience.
Another point: gameplay balance. If all Pokémon are replaced with squirrels, but their types and moves stay the same, the game plays mostly as normal, but with visual changes. However, if the hack changes types and moves for humor, the gameplay diverges more. Need to check whether the Squirrels hack does either. 1636 Pokemon Fire Red Squirrels Rom
Also, considering the source. How does one replace all Pokémon with squirrels in FireRed? The original game's data includes a lot of specific information for each Pokémon, like base stats, types, abilities, moves, etc. Changing the sprites would require editing each Pokémon's sprite data. If the hack is only a visual change, the gameplay remains the same. If they also changed types and moves for comedic effect, that's more involved. The report should touch on both possibilities. Technical details would be important here