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
If you are trying to verify you have the correct file for a mod, check its . Modders specifically look for the code DD88761C to ensure the patch will work correctly. Where to find it 1636 Pokemon Fire Red - U-- Squirrels- Download
: Focuses on the Kanto Pokédex, with the National Dex (Gen 2 and 3 Pokémon) unlocked only after the Elite Four . Using the later "v1