Pokémon: The Case of the K-9 Caper!

Ash enrolls Pikachu in a training school for police Growlithe. But the course is tougher than he imagined, for himself and for Pikachu. Ash wants Pikachu to be as tough as Kanto's finest, but Pikachu is Pika-pooped. At that moment, Team Rocket floods the schoolground with helium gas, and everyone's voices become squeaky. Jessie and James use a special voice-changing megaphone to sound like Officer Jenny, and command the Growlithe to follow them. They almost get away with it, too, but the Growlithe remember their special bond with the real Officer Jenny, who raised them and trained them. The Growlithe chase off Team Rocket, and Ash realizes that Pikachu doesn't need to be a police Pokémon—it's fine just the way it is.