Get the Ice Key from one of the Banjo-Kazooie game paks. Then, go to the waterfall caverns in Glitter Gulch Mine. Use Talon Torpedo on the rock with Kazooie on it and you will find a safe. Use the Ice Key, and a Mega Glowbo will appear. Go to Wumba's hut in Pine Grove and you will turn Kazooie into a Dragon.