Final answer:
Toto, from The Wizard of Oz, does not appear in any of the listed Disney Channel shows: That's so Raven, Corey in the house, Even Stevens, or The suite life of Zach and Cody.
Step-by-step explanation:
The character Toto is most famously known from The Wizard of Oz, but regarding the Disney Channel shows, Toto has not been a character in any of the listed series. Therefore, the options A) That's so Raven, B) Corey in the house, C) Even Stevens, and D) The suite life of Zach and Cody do not feature the character Toto. It's possible that there might be a confusion with another show or a specific episode where a similar dog appears, but Toto as known from The Wizard of Oz is not part of these shows' regular cast or episodes.