I miss some things from the original SSB that weren't in SSBM. For example, having your characters introduced in special ways, ex. DK in a barrel.
Anything you miss from the original?
From the trailers, it seems that when you kill someone by throwing them too far up, they just explode like they do when they fall off. I can see why they've taken it out, but it was a nice feature. I can't say I miss much, save for perhaps that Pokemon stage, I remember the thing that blew up, it always was useful .