Tonton Streaming Heathcliff and the Catillac Cats (1984) S1E33 - Brain Sprain

Heathcliff accidentally solves a Rubik's cube-type puzzle, so Iggy decides his cat must be a genius and submits him to a scientist for laboratory testing. Heathcliff doesn't blend well with the other animals, and in no time has managed to cause countless squabbles and sabotage all the lab tests.