How do you beat Wallace on Pokemon emerald?

Answer 1

By making all his pokemons fainted.

Lol at the guy before me. There are three ways:

1) Type Trump. Simple. High level grass and electric, flying for the part grass. Easy stuff.

2) Use stats to your advantage. E.g. Milotic has high sp. deffense, so sweep it with physical attacks.

3) Bash out your Lv70 Rayquaza. He's awesome but that's really nooby.