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Donkey Kong, sometimes referred to as DK, is a minor character who appears as an antagonist/anti-hero in the first season of Mario and Luigi's Stupid and Dumb Adventures. He is a big gorilla with brown hair. He defeats The Eagle and fights Bowser in a few episodes in Mario and Luigi's Stupid and Dumb Adventures. In "Bowser Junior's Playtime Problem", he was revealed to be Diddy Kong's father. He gets angry when someone calls him Jimmy Neutron. 
Although Donkey Kong can talk, he does not speak anymore for some reason as he currently does sound effects instead.