|First Appearance||Quest for the Mushroom|
|Latest Appearance||The Third Movie|
Sylvestor has a speech impediment, unable to say anything without a lisp or raspberry. Sylvestor is shown to be very kind-hearted and cares very much about his friends, especially Mario and Luigi. When he first appeared, he instantly offered to help when Luigi was injured and knocked out by Bullet Bill. He gave Mario a talking map which lead to a Mushroom that could restore Luigi, which he unfortunatly had to crap out, for whatever reason. He was incredibly worried and concerned that Luigi was going to die soon, until Mario arrived with the Mushroom in tow. He is shown to be a doctor, as he often helps Mario or Luigi when they are ill. He has never been angry nor acts aggresively towards others, save for the Map. He does, however, have a bit of a mischevious side, as he partakes in Mario and Jack's teasing Luigi. He also laughed at Luigi's foolish display along with Batman.
The Third Movie
In The Third Movie, Sylvester is with Jack, Luigi, Yoshi, and Peach as Mario tells them about his adventure and his new goal to save the world. However, Luigi and Sylvester realized that Gonzo could be on his way to their house. Right after, somebody came to the door, knocked, and rang the doorbell. Mario and Luigi checked if it was Gonzo, and it was. Mario told everyone to run, so everyone ran, including Sylvester.
My New Haircut
The Sleepwalking Disorder
In Mario's Birthday, Sylvester is one of the people who come to Mario's birthday party.
Quest for the Mushroom
In Quest for the Mushroom, Sylvester makes his debut, and gives Mario a map to find the mushroom to save Luigi.