Augustus "Gus" Monkey is Wally's 14-year old brother. Like Wally, he likes bananas and is the more mature one of the duo, though he does act immature sometimes. Sean Cullen provided his voice.
Appearance
Gus has dark-brown fur and has a blue rocket suit with a grey belt which also has a star. He also has a long tail, a pink nose, and combed and groomed hair. His eyes are colored green. Gus is shown to have a long, black unibrow, which he has had ever since he was a baby.
Personality
Gus is very competitive; this is proven by his rage at He-Rilla and She-Rilla, the Rocket Gorillas, just because they are better then him, Wally and YAY-OK. Gus is also very bossy because he is the captain and loves to make his pet Inky draw stuff with his octopus ink.
Relationships
Wally
Gus loves scareing people and goofing off with his younger brother.
YAY-OK
Gus has a good relationship with YAY-OK because he helps him on missions
Monkevil
Gus has a crush on Monkevil.