|Appears in:||"More Smarter"|
The Barbaric Versions are the forms of people seen when under the pressure of Brain Max, hearing the "idiotic versions" mumble gibberish. In reality, the people seen idiotic hear them speaking in Latin.
- Benson: When Mordecai and Rigby saw Benson stupid, he was floating in mid air and shaking his arms and legs around and mumbling gibberish and yelling. He also had a 4 o' Clock shadow as he did in "Peeps"; also, while falling through their smart memories, Mordecai and Rigby saw a gumball machine with piles of gumballs inside who mumbled complete gibberish at them. He also seems to be wayving his arms around like a monkey.
- Pops: Mordecai and Rigby saw Pops with an even huger head hunched over his chest, hair stubs all over his face, and shirtless. Besides gibberish, he's heard mumbling the baby words, "goo goo ga gee woo hoo."
- Skips: When Mordecai and Rigby saw Skips stupid, he looked the same but his coloring was brighter, his face appearance was different (More like a human's, and looked very realistic), his head was hunched over his body, more thinner, and less muscular as he mumbled unintelligible syllables.
- Muscle Man: When Mordecai and Rigby saw Muscle Man stupid, he looked like a bright green colored manatee-like creature who was sitting at the kitchen table stuffing his snout in pink pie.
- Hi Five Ghost: When Mordecai and Rigby saw Hi Five Ghost unintelligent, he was floating higher than usual next to Muscle Man at the kitchen table, looking like a light blue and white amoeba with a frown on his face.
- Mordecai and Rigby: Due to them being too smart, Benson, Pops, and Skips heard them speaking Latin, which people may consider a "stupid/dumb" language, if unaware.