The Numa Numa bollocks was never funny. Plus it had a shitload of clones thinking they could be just as funny by mouthing to the song. Either way the result was unfunnny waste of bandwith.
The N64 Kid is unique in such a fashion. You can't copy that and not look a total prick as you need the raw excitement of seeing this console for the first time. Maybe we'll get a future generation with the Wii.
Plus, I don't know if anyone else picked this up, but I'm sure the girl says "Thank you Santa", surely that must've crushed the parents to see their boy having his first orgasm resulting in ejaculation over a present they bought but the kid may never know...
Additionally, not as good, but nice: