1636 Pokemon Fire Red - U-- — Squirrels

1636: Pokémon FireRed — U-- Squirrels

(Note: 1636 in hex = 4, but that’s invalid usually. So maybe 0x1636 = 5686 in decimal – not a real Pokémon.)

Conclusion

1636 Pokémon FireRed (U) (Squirrels)

is widely recognized as the industry-standard "clean" dump of the original Pokémon FireRed Version 1.0 1636 Pokemon Fire Red - U-- Squirrels

To ensure you have the correct file for patching, you can verify it using its CRC32 checksum , which is 1636: Pokémon FireRed — U-- Squirrels (Note: 1636

"U-- used SCRITCH."