Ristar - All Boss Encounters - NO DAMAGE!!

Bosses Beaten in Order:

Armored Tree Snake - Planet Floria
Riho Is Coming - Planet Floria
Orblet Trio - Planet Undertow
Ohsat Attack - Planet Undertow
Memory Machine - Planet Scorch
Adahan Fall - Planet Scorch
Composer Bird - Planet Sonata
Awuaeck's Sing - Planet Sonata
Freon Kid - Planet Freon
Itamor Lunch - Planet Freon
Head Orblet - Planet Automaton
Uranim Power - Planet Automaton
Eyebar - 555 - Space Fortress
Kaiser Greedy - Space Fortress

This was a fun challenge the two bosses that gave me trouble were the Ice boss and Greedy since one had a non existant hitbox after eating a pizza at the right time avoiding a hit, Greedy's lightning attack was the hardest to dodge since it was so fast..