When I was battling Nauscour recently in Colosseum, His Wailrien used Ice beam on my Raikou. My Raikou got frozen so I commanded my Hitmontop to use Aspear Berry(heals Frozen PKMN) on Raikou and I commanded my Raikou to use thunder. My Raikou got UnFrozen and he used thunder. When he used thunder he didnt move at all as If he was still frozen! the thunder knocked out Nascours Gardivor and Raikou fainted because Wailrien used Ice Beam. Again, Raikou Fainted as if he was STILL frozen! Have you expeirienced somthing like this in Colosseum?