Toward the end of Episode 30 (Moving Picture) of Season 4 – Johto League Champions Ash and the gang decide to turn a Sunkern into a Sunflora with a Sun Stone. When Ash pulls out his Pokedex it says that the Stone can also be used to turn Gloom into Vileplume. This is completely wrong. In order to evolve Gloom into a Vileplume a Leaf Stone is required. With a Sun Stone Gloom would evolve into a Bellossom.