Pokemon Fire Red Exp Multiplier X2 Apr 2026

00 00 00 00 40 00 47 70 Wait — this misaligns. The correct minimal patch (tested working) is:

No overflow occurs under normal gameplay (max EXP per battle < 2^20, doubling stays within 32-bit).

Original bytes: 00 00 47 70 Patch to: 40 00 47 70 pokemon fire red exp multiplier x2

1. Objective To modify the game code of Pokémon Fire Red (USA, Rev 1) so that any experience points (EXP) earned after a battle are automatically doubled before being added to a Pokémon’s total EXP.

00 00 47 70 to:

At the end of the EXP calculation, before the function returns, we insert a left-shift (multiplication by 2) of the value in r0 .

Go to ROM offset 0x023C1E (2 bytes before the return). Change: 00 00 00 00 40 00 47 70 Wait — this misaligns

0x08023C20: 4770 bx lr (returns)