Season 1 Episodes13
Cast4

Greg Cipes

Kevin Michael Richardson

Corey Feldman
SPRX-77

Mark Hamill
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Ranked #10 of 13 in Season 1•−0.3 vs season avg
A foe known as the "Supreme Destructor" is causing havoc. He apparently killed Jinmay. The monkeys and Chiro travel to outer space in search of the villain. He is revealed to be Mandarin, working for the Skeleton King. The monkeys are busy trying to escape

Greg Cipes

Kevin Michael Richardson

Corey Feldman
SPRX-77

Mark Hamill
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"Hidden Fortress" is episode 13 of Super Robot Monkey Team Hyperforce Go! season 1. It scored 6.3/10 from 21 votes, ranking #10 of 13 episodes this season (season average 6.6). It aired on December 18, 2004.