Bump
In the episode 'You Are Rad', i feel like they make a Spongebob reference right after the title card when KO breathes in an exaggerated fashion and says "I forgot my nametag!"
Also, this character kind of resembles Commander Keen
Blue eyes, pale skin, orange hair, wearing something purple on their torso, and the yellow helmet with the green stripe on it (minus the white stripe)
I'm sure that there's video game references scattered throughout this show considering it's premise is partially a beat-em-up with character levels, but that one really stood out to me in particular