Frostbite

David's Froslass, nicknamed Frostbite, is the seventh Pokemon caught by David in the Sinnoh region. David's Froslass was caught as a Snorunt that was abandoned by her old trainer, and was initally skeptical of David and afraid of humans. She realized how much David cared about her and used a Dawn Stone to evolve into Froslass in an enormous time of need for David, saving his life. Froslass has since become a valuble member of his team.

History
David caught her as a Snorunt that was lost and sick due to the weather in the area her old trainer abandoned her at. Initally skeptical of David's kindness to her, Snorunt realized how much David cared about her when the ship they were in began to go down. She snatched the Dawn Stone from inside David's backpack and used it to evolve into Froslass. Froslass has become a very valuble member of David's team, extremely powerful and graceful.

Following his journies through Sinnoh, David dropped off Frostbite and the rest of his Pokemon at his house, starting with a clean slate for his travels through Unova.