Hmm, button mashing in Mario Party sounds kind of odd. Nintendo do know that there are only a certain amount of button mashing mini games people can handle don't they? However, they're the only games that my friends seem to understand.
Smash Bros, there's a tactic in that that every single person I have played against uses, apart from my sister. It's a popular game, bit mindless if you ask me though and button mashing is a biiiiig part of it. Maybe it'll be a success. But, not using the Wiimote is going to earn itself bad reviews.
Sorry for replying and not have played the game though >_<;