Best pokemon to get rid of wall's (soul silver)?

okay so i broke out my old soul silver and i decided to play with some friends. well my one friend always has 5 wall (they differ cause he has a massive collection of wall'ers) so i was wondering you if you tell me a good set up to get rid of wall'ers. if you think its going to be a long answer just email me at kadoking@hotmail.com. please dont be obvious with answers like get a deoxys (attack forme) and just blast the heck out of them.