I think Kirb predicted this would happen,
This series kinda lost its punch after the 2nd one. Although there was a bit of entertainment (The how to shock everyone in a tournament thing I enjoyed most since I prefer items and a WiiMote + nunchuck ) I don't think there should be another one, just quit while your ahead... but if you really want to make another one in the future, try to find something that would make a majority of the world laugh or stare in amazement.