Guest Stars Nick Stellate voices Pokédex Matthew Sussman voices Meowth Ted Lewis voices James Stuart Zagnit voices Professor Oak Megan Hollingshead voices Nurse Joy Eric Stuart voices Ekans Veronica Taylor voices Delia Ketchum James Carter Cathcart voices Rattata Rachael Lillis voices Jessie / Chansey / Goldeen Uncredited Michael Haigney voices Koffing Lee Quick voices Officer Jenny