
Originally Posted by
Dark Aura
You don't really need one of the GBA games in order to beat the Orre Colosseum - or to do anything, really. You can easily build up a team and beat it with Pokémon you snag in XD.
The level of the enemy Pokémon you meet in the Colosseum seems to be at the same as your highest leveled Pokémon. So all you need is a team with Pokémon around the same level as your toughest one.
These battles seem to specialize in 2vs2 battles, so they seem to be smarter than the regular trainers. Keep an eye out!
Also, the minimum level of the opponents at Orre Colosseum is Lv. 60.
Gen1 Pokedex: 151/151
Gen2 Pokedex: 251/251
Gen3 Pokedex: 386/386
Gen4 Pokedex: 493/493
Gen5 Pokedex: 649/649