Dennis is a minor character in Clarence. He is the pet dog of Clarence, Chad, and Mary. Dennis has only been mentioned, and has not made a physical appearance in the show yet. He could have possibly appeared in Dullance, but the series has yet to prove this was Dennis
- Clarence's Millions (food dish seen)
- The Forgotten (mentioned)
- Chimney (mentioned)
- Lil' Buddy (doghouse seen)
- Chalmers Santiago (mentioned)
- Mystery Girl (mentioned)
- He is possibly still feral, dead, or adopted by another person as he most likely has no collar or microchip. Is possible that Dennis doesn't exists at all, and it was made up by Clarence's mom to stop him asking her for a dog.