Twilight Princess is one of the few Zelda games that does not have a magic meter. As such, there is no need for Green Chu Jelly, which is an item used to refill magic in other Zelda games. However, in the Wii version, it is possible to obtain Green Chu Jelly through normal means. But it is only possible once, in the "Cave of Ordeals", room 19. Carefully kill all of the purple Chus and let a Blue Chu and and Yellow Chu merge. Kill it and then scoop up the remains with a bottle. Link will now be holding a bottle of Green Chu Jelly. It has no text, description or effect whatsoever. However, performing this trick in the GameCube version produces a Purple Chu instead.