| Pokémon defeated | Base EXP | Normal gain | With 2× patch | |----------------|----------|-------------|----------------| | Rattata (Lv.3) | 45 | 45 | 90 | | Pidgey (Lv.5) | 55 | 55 | 110 | | Trainer battle | 400 | 400 | 800 |
No overflow occurs under normal gameplay (max EXP per battle < 2^20, doubling stays within 32-bit). pokemon fire red exp multiplier x2
Original bytes: 00 00 47 70 Patch to: 40 00 47 70 | Pokémon defeated | Base EXP | Normal
We overwrite a few preceding bytes to add lsl r0, r0, #1 (logical shift left by 1 = multiply by 2), then return. pokemon fire red exp multiplier x2