Giant Cannonballs are obstacles/enemies in New Super Mario Bros. Wii. They only appear in World 8's Airship level. They are much bigger and faster than regular Cannonballs, making them harder for the player to avoid. Giant Cannonballs are, like Cannonballs, fired from Cannons, however, the Cannons resemble Warp Pipes but are colored black to not confuse the player. Even though Cannonballs appeared in Super Mario Galaxy as obstacles/enemies, Giant Cannonballs, strangely, did not appear in Super Mario Galaxy.