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Misty's Corsola (Japanese: カスミのサニーゴ Kasumi's Sunnygo) was the second Pokémon acquired by Misty in the Johto region and her ninth total. Its Japanese voice actress is Ikue Ohtani and its English voice actress is Kayzie Rogers.
Ash, Misty, and Brock were traveling through the Whirl Islands in the oceans of Johto when Professor Elm showed off his Corsola. Seeing it made Misty desire one.
This continued until a few episodes later when, on Yellow Rock Isle, the group met a family who raised Corsola to make jewelry out of their shed body parts. In fact, their house was even built on a colony of coral Pokémon. However, a wild Corsola came along, invaded the ranch, and started to bother the trained Corsola, causing them to flee. Eventually, all of the Corsola were recovered, and Misty caught the aggressive wild one with a Lure Ball she got from Kurt. She used Corsola to win a Water-Pokémon surfing race at the start of the fifth Movie.
Misty's Corsola seems to have a stubborn and aggressive personality. She used it a lot in Johto, and continues to use it regularly in Gym Battles in her role as Gym Leader of Cerulean City.
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For more information on this Pokémon's species, see Corsola.