Eustace is a antonigist in Abandoned Discovery Island.
He is like Goofy, who is greyscale like from the cartoons and old times but but parts of his body seem to be cut up and sewn together.
Eustace starts in the Broadcasting Room with Suicide Mouse, and when he activates, the television on the floor to the very left of the room will turn on with a fuzzy screen, playing a broken music box, he then moves to, Character Prep 1, Staff Area, Meat Freezer, Lounge, then finally into the Office.
He can say the following things when moving.
- "It's a secret to everybody"
- "I'll be your friend"
- "Don't you love me?'
- "I helped you, and got nothing in return"
- "I'll always be here"
- "I won't tell anybody else"
- "You can trust me"
- ""Wherever you go, I will follow"
- He is in a Mickey Mouse creepypasta entitled "Mickey's Best Friend".
- One of his quotes is a reference to The Legend of Zelda, it is the one that says "It's a secret to everybody"
- Like in the Mickey's Best Friend creepypasta, it is believed that Eustace is the same being as Pluto.
- The theme that plays is the broken music box theme from "suicidemouse.avi".
- Eustace is Billy's best friend, and are connected to each other.
- Eustace is connected to Suicide Mouse.
- Eustace and Suicide Mouse's Behavior are the same.
- He is in a FNATI fan game entitled "Room Zero"