Pokémon Mega Evolution and the Prism Tower! (1997– ) Online
As Serena trains with her mother to become a Sihorn racer, Satoshi, Citron, and Eureka are in Miare City, racing to Professor Platane's Pokémon Lab to get help for Keromatsu, who took a lot of damage during the battle with Team Rocket. The professor welcomes them and puts Keromatsu in the care of his assistant, Sophie. He explains to Satoshi and the others that Keromatsu is an unusual case--though it's a Pokémon meant for new Trainers, it doesn't always listen to them, and it's been returned to the lab more than once. This shocks Satoshi, who admires the fearless Keromatsu for the way it saved Pikachu. Platane also talks about his research on Pokémon Evolution, including a newly discovered phenomenon known as Mega Evolution, where even fully evolved Pokémon can evolve again--and then return to their previous form. The science-minded Citron is very intrigued...and so are Musashi, Kojiro, and Nyarth, eavesdropping as usual. They decide to catch Garburias and figure out how to make it ...
| Episode cast overview, first billed only: | |||
 | Rica Matsumoto | - | Satoshi (voice) |
 | Sarah Natochenny | - | Ash Ketchum (voice) |
 | Haven Paschall | - | Serena (voice) |
 | Mike Liscio | - | Clemont (voice) (as Michael Liscio Jr.) |
 | Alyson Leigh Rosenfeld | - | Bonnie (voice) |
 | Rodger Parsons | - | Narrator (voice) |
 | James Carter Cathcart | - | James / Meowth / Blaziken (voice) (as Carter Cathcart) |
 | Michele Knotz | - | Jessie / Psyduck / Combee (voice) |
| Saskia Maarleveld | - | Officer Jenny (voice) |
| Suzy Myers Jackson | - | Sophie (voice) (as Suzy Myers) |
| Lisa Ortiz | - | Reporter / Fletchling (voice) |
 | Jake Paque | - | Professor Sycamore (voice) |
 | Bill Rogers | - | Zigzagoon (voice) |
 | Kayzie Rogers | - | Wobbuffet / Azurill (voice) |
 | Erica Schroeder | - | Grace (voice) |