This page is about Theodore's anti-counterpart. For Theodore Prime, click here.
Theo (also known as Evil Theodore, Anti-Theodore and Thaeo in The Chipmunk Multi-Verse) is the evil version of Theodore Seville. He has Theodore's youthful charm, but is stubborn and picky. He also reports everything the others do to Melvin and does seem to be very loyal to him. And is extremely defensive and Vengeful for Eloise. He has abandonned anything he thinks is "sissy" or childish, so he prefers to be called "Theo" or "Thaeo". He rules the Darkmunk Universe with his Brothers and The Darkettes, and has the Dark Elemental Power of Wind, and has mastered it completely. He also has the power to make anyone he comes into contact with become completely loyal to any one person he chooses.
Immortality - Theo cannot age nor die, but a limitation that he (and all the Darks have) is that they cannot have natural offspring.