Characters
Gus Monkey (voiced by Seán Cullen) is Wally's older brother, who has brown fur and a blue spacesuit, and is considered the smarter of the two. He wants nothing more than to be a hero, but he can't always put aside his monkey instincts. The closest thing the ship has to a captain, he takes being a GASI cadet very seriously — well, when he feels like it.
Wally Monkey (voiced by Mark Edwards) is Gus's younger brother, who has yellow fur and a red spacesuit. Poorly-groomed yet somehow adorable, Wally would rather be playing Banana Blasters or organizing his expired pudding collection than jetting off on some crazy expedition. If there's one thing Wally's good at, it's being a monkey — he can howl and fling with the best of them.
Yay-OK (voiced by David Berni) is Wally and Gus's Italian-accented robot companion that helps them on their adventures through space. There's nothing this robot wouldn't do for his beloved monkeys — after all, he's programmed that way. He's quite the charmer, too — from the fridge to the blender to the vending machine, there isn't a ladybot on board whose circuits he hasn't made beep a little faster.
Dr. Chimpsky (voiced by Jamie Watson) is the leader of GASI Headquarters. He assigns the Monkeys their critical missions (which sometimes include getting him more ice when his drink gets too warm) and does his best to keep them on track when they get distracted.
Inky (voiced by Mark Edwards) is a light purple octopus-like alien and an artist who communicates through his incredible ink drawings. Whether he's a member of the crew or just unbearably cute is anybody's guess. But either way, his artistic talents make him super fun to have around.
Lord Peel (voiced by Mark McKinney) is an alien shaped like a banana peel that is the main antagonist of the series, whom the monkeys constantly mistake for food. Before the events of the series, he was a noble businessman. But then the Rocket Monkeys began to crave him, and he's been trying to get revenge on them for trying to eat him and especially for forcing him into the dark side.
Nefarious (voiced by Seán Cullen) is a pink alien with large head lives in a prison asteroid, which he tries to escape in most episodes in which he appears.
SLO-MO (voiced by Teresa Pavlinek) is Nefarious's robot minion. Some episodes show her having (requited or not) an infatuation with Yay-OK.
Deep Space Dave (voiced by Seán Cullen) is a green alien superhero who always relies on his fans
