Omi
says:
Do you mean the screen actually freezes, like digital TV does with bad reception? If so you're definitely going to want to call Nintendo, it may just be a problem with the disc considering it only happens with one game.
If, on the other hand, you are talking about how it goes in slow motion every now and then, this is completely normal and can actually help you win the fight! It does this if you dodge side to side a few times, everything slows down and you get a chance to get some good punches in.
12 hours battery life is unfortunelty about average with a crappy pair of batteries. I have learned to buy the better ones, you will save money in the long run. It's definitely worth investing in some rechargables, but be careful, older ones can leak which will kill your wiimotes. My advice? Get yourself a Joytech Power Station, $35 from dstore, best accessory I've purchased. There's a review here if you'd like to know specifics. www.mywii.com.au/
Hope I was of some help. 
06/12/2007
Tassie