A strong mouse says that he will become the heavyweight champion of the world. But his grandma (who is just as strong) doesn't want him to fight...
| Directing | Friz Freleng | Director |
| Visual Effects | Jack Carr | Animation |
| Production | Leon Schlesinger | Producer |
| Sound | Bernard B. Brown | Music |
| Visual Effects | Don Williams | Animation |
| Crew | Bernard B. Brown | Compositor |
| Sound | Norman Spencer | Music |
| Sound | Bernard B. Brown | Sound Recordist |
