Spyro 2: Season of Flame (2002)

After the events of Spyro: Season of Ice, Spyro returns to the Dragon Realms and learns an army of Rhynocs infiltrated the Dragon Realms and stole all of its fireflies during Spyro's absence. Without the magic of the fireflies, the dragons cannot breathe fire; their breath, including Spyro's, has been turned icy cold. As a result, the temperatures of the Dragon Realms begin to drop, which threatens to force the dragons to migrate. (wiki)