Too bad we can't have the option to have level 100 battles anymore.
If you battle with friends, you can do a 'no restrictions' battle, which leaves level and everything exactly how they are in your party. It's an anything-goes battle, so you can use multiples of the same Pokémon and item, and use whatever Pokémon you want... but they will keep their level, so if you both have all level 100 Pokémon, you'd have a level 100 battle.
Earth is a silly place. Half the world has no clean water. And the other half has so much, they poo in it. 3DSFC: 2750 1911 5515 (Boldore, Barbaracle, Corsola)