Mellow Costello
| Mellow Costello | |
 | |
| Toon information | |
|---|---|
| Gender | Male |
| Species | Duck |
| Color(s) | Maroon, Apricot, Mint Green |
| Residential information | |
| Building | Mr. Costello's Yellow Cellos |
| Street | Tenor Terrace |
| Playground | Minnie's Melodyland |
| Map | |
  | |
Mellow Costello is an NPC duck Toon. He is the shopkeeper of Mr. Costello's Yellow Cellos, which is located on Tenor Terrace in Minnie's Melodyland.
Trivia
- His name is a reference to singer-songwriter Elvis Costello.