Super Mario Galaxy - Heavy Metal Mecha-Bowser

Toy Time Galaxy - Mission 1 Heavy Metal Mecha-Bowser Continuing with the whole thing, the next mission from Toy Time Galaxy I've chosen is the first mission. This time, I've added another limitation onto myself: I shall use only one Spring Mushroom, the minimum amount you can use to finish this stage. Also, if you're wondering what that big "?" Coin does...well, you're going to have to play the game to find out. Or look at someone else's video of this mission.