The series stars Kermit the Frog , Miss Piggy , Fozzie Bear , Animal , Scooter , Skeeter , Rowlf the Dog , and Gonzo as the main muppets .
The movie featured puppet versions of Kermit the Frog , Miss Piggy , Gonzo , Fozzie Bear , Scooter , and Rowlf as babies ( the puppet versions later returned one more time , for a home movie sequence in A Muppet Family Christmas ) .