Also, I'd like to take a second to briefly touch on Ike, and whether he causes lag or not. A few people have noted that he has a very high facepoint count. Usually, this is indicative of laggy imports. However, Ike's expressions (blink, halfblink, talk and ouch) account for roughly 13k facepoints. These expressions cycle out according to whichever animation is active at the time, so only one expression is visible at all times. This means that he's just barely at the cusp of lag on Wii, at ~20k facepoints. He MIGHT cause lag with other high-density imports in the same match, but in vanilla Smash 3, he'll always run smoothly.
That said, if you experience lag on Wii, please post here with specific details about the match. Number of players, characters being used, and stage are all we require! Thanks!