Pokemon 5 - Thunder Shock!

When Pokemon evolve, they are almost always stronger than before, and for Ash to win a ThunderBadge, Pikachu must defeat its evolved form, Raichu! It's a clash of lightning and pride! Later, Ash, Misty and Brock embark on a pleasure cruise aboard the St. Anne accompanied by other Pokemon and their trainers, but something seems wrong. Can the Cruise be a Team Rocket plot?!