For BAD games, nothing comes to my mind....for mediocre games yes there are, like all those mario-sports games made on gamecube (I've played mario strikers and tennis, not mario golf), they were useless in single player, quite good in multiplayer but not very exciting.
Wii sports has a very good idea, but in terms of prodution quality is mediocre in my opinion, the same goes for wii play and wii music but Wii sport resort and Wii fit are much better.







