Gus and Wally only need one more badge before they receive the prestigious GASI Red Tassel of Achievement, so when the opportunity arises to save a stranded princess, the boys jump at the chance.

Lord Peel seeks revenge on Gus and Wally by impersonating Santa and tricking them.

On GASI's "Switch Day," where everyone gets a new partner, the monkeys both end up getting a gorilla as their partner.

Nefarious finally gets to leave his asteroid, only to see his family.

He-Rilla & She-Rilla are getting married but Gus hurts She-Rilla's feelings at the wedding and he must make her feel better again.

In order to hide Deep Space Dave from a fire-breathing beast, Wally turns the rocket ship into a disco club.

In an attempt to out-do the Space Gorilla's best-selling fragrance, Gus and Wally create Monké, a horrifying smell of their own.

When Yay-Ok's robo-ripener hits Wally, it gives him a mustache, which means he is now the more mature monkey. This makes Gus jealous, especially when the new facial hair causes Monkevil to start falling in love with his brother.

A fight over Monkevil's affections causes a rift between Gus and Wally.