Kirchonn
Kirchonn the Invincible is one of Master Wu 's enemies, who once defeated him and his army of Six-Armed Warriors . While Kirchonn's army was imprisoned in the Mount of Shadows, Kirchonn himself was locked in prison along with various other adversaries of Wu, such as Cardinsto and the Time Ninja . They were later freed by Lord Garmadon in a bid to either eliminate Wu or leave him overconfident. .