Well anyways, I bought this... and I don't regret it a bit.
Some people say that they have slowdowns when playing Metal Slug 2 from this pack, but I can ensure that the slowdown only comes on PS2.
(PS2 deserves it)
I watched the Youtube video of the game and noticed that you are allowed also to play the game with nunchuck only. Is it possible to play a two player game while one player uses Wiimote and the other uses nunchuck? Or do I need another Wiimote?