A mouse is saved from committing suicide by a baby kangaroo, Hippety Hopper, who he frees from a crate on the docks. His new friend, who looks like a "king-sized mouse," then helps him get revenge on Sylvester the cat.
| Actor | Role |
|---|---|
 Mel BlancSylvester / mouse / Bulldog | Sylvester / mouse / Bulldog |