Ep 25. A Bout With Sprout

Ash and his friends are traveling through Johto when they come across a Pokemon Gym they have never seen before. This gym turns out to be a Grass-type gym run by a man named Erika. Erika is a Gym Leader from the Kanto region who has come to Johto to open a new gym.

Ash decides he wants to challenge Erika and her Grass-type Pokemon for a chance to win the Rainbow Badge. However, he must first prove himself by passing a test conducted by Erika's assistant. The test requires that Ash and his friends enter a maze and find their way to the end without getting lost. The maze is filled with all sorts of obstacles, including pitfalls and traps, as well as Erika's Pokemon. Ash and his friends must use their skills and knowledge to navigate through the maze and reach the end.

Once they reach the end, Ash is granted a chance to battle Erika. However, before the battle can begin, Team Rocket appears and tries to steal all of the gym's Pokemon. They are quickly thwarted by Erika's Pokemon, but the distraction allows one of her Pokemon, a Sudowoodo, to escape.

Ash and his friends offer to help Erika find Sudowoodo, and they set out on a search. Along the way, they encounter a boy who claims to be a Pokemon Trainer, but is actually a Pokemon poacher. Ash and his friends team up with Erika to stop the poacher and save Sudowoodo.

After a successful rescue mission, Ash finally gets to battle Erika for the Rainbow Badge. The battle is intense, but Ash's Pikachu ultimately emerges victorious against Erika's Tangela. With the Rainbow Badge in hand, Ash and his friends continue their journey through Johto.