Ijust got atyphlosion and my game froze and I can't play my Pokemon white..

I'm assuming that you got this Pokemon through a trade. If you didn't, you hacked it. All that matters is that somewhere along the lines this Pokemon was subject to hacking. You need to get rid of this Pokemon immediatly. If you cannot release it because your game is freezing then I'm afraid that you must restart your game. If a Pokemon is hacked too much or beyond the limitations of a legitimate Pokemon (for example making it's stats 999) the game will recognise it as a hack and will react badly. If the hacking was done incorrectly, it can corrupt data. Hooking your game up to a large console Pokemon game (like Colosseum) may result in a fix. The large console game might "punish" you by changing the hacked Pokemon to a Bad Egg, which is easier to manage. Although some of your legitimate Pokemon might also be changed.

In short, the Pokemon is bad. Release it ASAP (if possible), otherwise delete the save file.