| Please note the following:
Dewey Donedidit is the main antagonist of Jeffy's TV Show!. He is a television show producer who is later to be revealed to be a con artist. He saw Rosalina's video about Jeffy and adored it. He wanted to make a reality show featuring them, and got Mario to sign a contract and said he will get $15,000 but he says to Mario after he gets kicked out from the show that under the line that says he will get $15,000 but he actually won't. He ended up replacing Mario, Rosalina, and Jeffy, and changed various minor things, and left Mario with a bullet wound and his mustache shaved. He later reappeared in Logan Reacts: Jeffy's TV Show, where he reacts to the video along with Logan.
Likes and Dislikes
- Jeffy (currently)
- Brooklyn T. Guy
- Silly String
- People getting shot
- People speaking loudly
- Making Rosalina's script blank
- The white couch
- The Monkey
- Charleyyy and Friends (possibly)
- Jeffy (formerly)
- Goodman (most likely)
- Bowser (possibly)
- People screaming
- Mario's hat
- Mario's mustache
- The red couch
- He was confirmed to be 23 on an Instagram post.
- While Logan enjoys Tito playing as Dewey, everyone hates him because of him conning Mario.
- Donedidit is similar to Al McWhiggin, the guy who stole Woody in Toy Story 2. Both characters have an interest in money. Tito's voice and appearance are similar to Al's actor, Wayne Knight.
- In a Chilly video, it was revealed that Tito regrets playing him due to the hate he got in that video.
- Dewey will never appear again due to Tito being fired along with Chilly but may appear with a different actor.