Raposo enjoyed doing animation voicework. Other forays of his into the craft included both the tenor singing role of "master pickler" Gil Gickler in DePatie-Freleng's Dr. Seuss cartoon program "Pontoffel Pock, Where Are You?" and Gickler's spoken dialogue. Raposo also performed at least three other character voices in the cartoon, including a Groogen musician whose "flugel bugle" is destroyed by Pontoffel in an attack flyover, as the ancient Senior Fairy above McGillicuddy who oversees the fairy squadron's worldwide search for the missing Pock and his piano, and as an angry Groogen dairywoman spilt milk upon by a too-close fly-by of Pontoffel's.