Ash has seen this movie.
Pikachu and the gang learn responsibility, teamwork as well as cooperation during their Summer vacation at Pokemon Island.
| Pikachu / Tosakinto (voice) | Ikue Otani |
| Togepy (voice) | Satomi Korogi |
| Zenigame / Koduck / Rokon (voice) | Rikako Aikawa |
| Fushigidane / Pigeon (voice) | Megumi Hayashibara |
| Lizardon / Hitodeman / Isitsubute / Zubat (voice) | Shin-ichiro Miki |
| Arbok (voice) | Kouichi Sakaguchi |
| Bulu (voice) | Naoki Tatsuta |
| Raichu (voice) | Urara Takano |
| Maril / Purin (voice) | Mika Kanai |
| Karakara (voice) | Chiyako Shibahara |
| Satoshi (voice) | Rica Matsumoto |
| Kasumi (voice) | Mayumi Izuka |
| Takeshi (voice) | Yuji Ueda |
| Narrator (voice) | Aiko Sato |
| Lucky (voice) (uncredited) | Tomoe Hanba |
| Nyarth (voice) (uncredited) | Inuko Inuyama |
| Iwark / Matadogas / Koiking (voice) (uncredited) | Unsho Ishizuka |
| Okorizaru (voice) (uncredited) | Hiroshi Otake |
