They are the bosses of planets (and Castle Greedy) in all versions of Ristar.
“Kaiser Greedy is the final boss of the game Ristar. Kaiser Greedy is a power hungry dictator...Kaiser Greedy
“Inonis is Greedy's right-hand man and a scientist in the game Ristar. Background Inonis is the...Inonis
“Ohsat is an enemy in Ristar. Ohsat is a purple and blue hammerhead (shark) who invaded the Water...Ohsat
“The Freon kid is a child of A sertain biped. he has got purple skin and a skin color shell. In...Freon Kid
“Background The Armored Tree Snake is the mini-boss of Planet Flora in the game Ristar. Other...Armoured Tree Snake
“This rabbit is the boss of Planet Timu. Battle arena The fight against him takes place in an...Unnamed Rabbit Boss