I would put this one 4.5 but when I animation collab stay satisfied as It summarize well history newgrounds and will not fail no character that marked the history of newgrounds all times and I also see including the entire crew of newgrounds, but not all.
and here's a list of what you missed.
1: N00bNation
2: glock grounp
this two you missed.
but the rest is fine and all the other well done.