| Name | Character | Episodes |
|---|---|---|
| Brad Garrett | The Big Dog (voice) | 52 |
| Brian Cummings | Hollywood (voice) | 52 |
| Jim Cummings | Morocco Mole (voice) | 39 |
| Tony Jay | Double-Q (voice) | 39 |
| Jess Harnell | Secret Squirrel (voice) | 39 |
| Rob Paulsen | Cubby | 13 |
| Whit Hertford | Buzz | 13 |
| Jarrett Lennon | Kenny Fowler | 13 |
| Kimmy Robertson | Penny (voice) | 3 |
| Billy West | 2 | |
| Tom Kenny | 1 | |
| John Kricfalusi | 1 | |
| Roger Rose | Quark (voice) | 1 |
| Roger Rose | Platypus (voice) | 1 |
| Chantal Strand | 1 | |
| Mark Hamill | Platypus | 0 |
| Frank Welker | 0 | |
| Rob Paulsen | 0 | |
| Nancy Cartwright | 0 |