How do you defeat the guinea pig in Achievement Unlocked 3?

You don't defeat the guinea pig in Achievement Unlocked 3. It's actually a companion that helps you throughout the game!

The guinea pig, named Fuzzy, is a powerful ally that provides various benefits:

* Heals you: Fuzzy can use his healing abilities to restore your health.

* Boosts your stats: Fuzzy can enhance your attack and defense stats.

* Offers guidance: Fuzzy can provide hints and information to help you progress through the game.

Therefore, instead of trying to "defeat" Fuzzy, you should befriend him and utilize his help to overcome the game's challenges.