In A Goofy Movie (1995), Mickey Mouse and Donald Duck make a cameo during the "On the Open Road" number, where while hitchhiking Mickey sings the line, "And it's Californ-i-a or bust".
Runaway Brain: Why Disney's evil Mickey short movie will never be seen - Polygon
Walt Disney's Mickey Mouse: Runaway Brain (S) (1995) - Filmaffinity
Disney Touch-n-Crawl Baby Mickey Mouse Mattel 1995 Crawling Plush - Yardley, PA Patch