You must leave Candy Corn in your party for all fights. Because Candy Corn always skips its turn (it usually has no attack and cannot play cards) this will make things slightly more difficult. Candy Corn gets a hit point bonus, making it useful to absorb damage. Enemies will also favor attacking Candy Corn. Because of this, also consider getting the "brown stripe" costume upgrade from Shady to increase Candy Corn's defense. Because combat can be started at any time, always leave Candy Corn in the second party slot. Note: Candy Corn will have a chance to take an action during the final fight.