Chikorita was released by her told trainer Ryan because she wasn't able to master Leaf Storm. Jon helped Chikorita to learn Leaf Storm and Chikorita decided to travel with Jon. In Hunter M Returns, Chikorita evolves into Bayleef to save Jon from falling over the edge using Vine Whip. Bayleef evolved into Meganium while facing Ryan's Meganium during the Johto League, in Ryan VS Jon. The Beginning To The Battle!