Ralph the mouse lives at the Mountain View Inn and loves his motorcycle. When the inn becomes overriden with mice and Ralph's friend Matt the bellboy must leave, Ralph asks his other friend Ryan to take him to school as part of a plan to help Matt.
| Actor | Role |
|---|---|
 Robert OliveriRyan | Ryan |
 Britt LeachRichard Costa | Richard Costa |
 Lou CutellMr. Minch | Mr. Minch |
| JJacob KennerBrad | Brad |
 Kimmy RobertsonEmma Spritz | Emma Spritz |
| AAustin KellyWilliam Spritz | William Spritz |
 Karen BlackMiss Kuchenbacker | Miss Kuchenbacker |
 Ray WalstonMatt | Matt |
| JJohn Clark MatthewsRalph the Mouse (voice) | Ralph the Mouse (voice) |
| SSharon BattsMelissa | Melissa |
| JJ.J. AndersonGordon | Gordon |
| MMary GradyInez Pierce | Inez Pierce |
| SSusie DuffMrs. Bramble | Mrs. Bramble |
 Jimmy BridgesRod | Rod |
 June ForayMouse (voice) | Mouse (voice) |
 Will RyanMouse (voice) | Mouse (voice) |
| RRick PolizziMouse (voice) (uncredited) | Mouse (voice) (uncredited) |