The unlucky Robby begins a voyage to the planet Isekandar, but gains an unlikely travelling companion in the brilliant young Hatchi.

Robby and Hatchi make a pit stop on Mars, where they encounter an octopus.

As Robby and Hatchi try to figure out why Hizakuriger is aboard their ship, they are force to land on Pluto. There, the pair are asked to do for Pluto what they did for Mars, only this time, there is another ad agency already on the case.

On the ocean planet Odwarla, Hatchi and Robby encounter the indigenous merfolk.

Robby and Hatchi hit a road block when they find themselves in need of travel permits, so they take a detour to Haccone for a dip in the hot springs and think about what to do next.

Yang corners Robby and Hatchi on Hamama II during the planet's Great Eel Festival; the eels' powers have an effect on Yang.