A: Most versions called “Squirrels” are short joke hacks – expect main story intact with swapped sprites/encounters.
Using the later "v1.1" version often causes ROM hacks to crash or fail because the memory addresses (offsets) where the data is stored are different. Technical Details for Verification 1636 Pokemon Fire Red - U-- Squirrels- Download
, which has become the gold standard for the fan-modding community. The Blueprint of Modern ROM Hacking Pokémon FireRed A: Most versions called “Squirrels” are short joke