Yes you can look in the instruction booklet to see which games are compatible with the balance board.
NO.
No it isn't any
No but it is compatible.
Well, if you want the 2010 olyimpics then try Mario and Sonic at the Winter Olyimpic Games for Wii and DS
He is in Icepeak, but outside of the adventure mode he is playable in any event.
for skeleton i would say: sonic shadow silver luigi Mario blaze donkey kong or metal sonic that's my opinion cause i have the game and they work PERFECT! for me! :)
you cant become skeleton Mario you only become: fire Mario, ice Mario, boo Mario, and bee Mario.
No you do not. However, some of the events may require or may be enhanced by a Balance Board
...What are "olyimpic" games? And Mario can't beat Sonic at anything, so this question is irrelevant.
No, you can just use the Wii remote.
Yes and No There is a character called Dry Bones who is like a skeleton but is not called skeleton
Yeah depending on what game it is if its wii fit you need the board if its Mario and sonic at the winter Olympics you don't need it.