Pokémon FireRed , there is no legitimate in-game setting to toggle a 2x EXP multiplier. To achieve this, you must use either external cheat codes on an emulator or specific in-game items that boost experience gain. GameShark & Action Replay Codes

Many players jump straight to infinite Rare Candies or a 100x Exp modifier. However, those extreme cheats often ruin the fun by making your Pokémon instantly overleveled, wiping out any sense of challenge or progression.

A widely used GameShark code for continuous leveling is: 74000130 027D 7300218C 0001 82023D50 1388 .

The is not just a cheat; for many, it’s a necessary quality-of-life fix that respects the adult player’s limited time. Why spend 20 hours grinding to level 65, when you could spend 10?

A high-level trainer Pokémon yielding 1,200 EXP jumps to 2,400 EXP.