on my first play through of Pokémon X I trained all of my Pokémon to lvl 100 in preparation for the elite 4 XD but I trained my Chesnaught up to 100 first.
In X and Y almost all of my whole team is at level 100:
A male Delphox with Flame Charge, Psyshock, Power-Up Punch and Shadow Ball.
An Yveltal with Fly, Phantom Force, Oblivion Wing and Dark Pulse.
A female Lapras with Psychic, Sheer Cold, Waterfall and Surf.
A male Blaziken i got from a mystery gift with Rock Smash, Incinerate, Shadow Claw and Brave Bird.
(Of course) a male Lucario with Aurasphere, Poison Jab, Dragon Pulse and Strength.
And a Mewtwo with Ice Beam, Charge Beam, Incinerate and Shadow Ball!
Their stats are modified from the training we can give them in the Super Training (in french it's called Virtual Perfectioning System)!