I am currently watching it and I can’t name most of them but so far I see:
Edd, Matt, Tom and Tord
Bob and Bosip
Tricky and Hatsune Miku
Whitty and Tabi
Pom Pom and someone I can’t see
Garcello and I don’t know who that is lol
Matt, Shaggy and Tree
Nene and Darnell
Ruv and Sarv
Kapi and idk their name
Imposter and idk
Hex (I think), I couldn’t see them, and Ayana
I saw Updike just walkin around in the background of the last song-

HOLD ON IT HAS ALL THE CHARACTERS IN THE CREDITS, THAT’S AN EASY QUESTION IF YOU JUST LOOK AT THE CREDITS