In the green star piece, from front to back, that's Jinx, Booster, and Johnny.
In the purple star piece, to the left of Yaridovich's head, are the Axem Rangers and the Blade's head is behind them. To the right of Yaridovich is Mack (below) and Boomer (above). (Note the balled tips of Mack's horns; Exor's horns are pointed.)
In the yellow star piece, I believe that person right of Belome is Punchinello. It looks like someone might be peeking out from behind Belome but it looks like all that can be seen are the person's eyes.
The fifth person in the blue star piece, peeking out over Toadofsky's head, is Boshi, I think.
Edit: I'm not tagging Boomer because I think our current boomer tag is not applied correctly.