Professor Starstone debuts in Chapter 213.
Angie of Team Aqua approaches him, offering generous funding for his research; enough that he doesn't have to worry about money. He is very grateful and admires their goal to preserve the sea, commenting that the sea is the source of life.
He finds the Meteorite. Angie brings him to Mt. Chimney, where he sees the unconscious form of Ark and is told that dangerous enemies seek to prevent Team Aqua's success. He volunteers to set up the Meteorite in Team Aqua's machine, activating the machine and causing the death of Mt. Chimney.