OK K.O.! Let's Be Heroes (2017)

S1E5 Jethro's All Yours

K.O. takes on a formidable challenge as he faces off against one of Lord Boxman's robots solo. As the confrontation escalates, he finds himself pitted against increasingly larger models of the same foe. In a surprising twist, K.O. discovers an unexpected connection between himself and the robotic adversaries, shedding new light on his battle.