The Egg Shroom Mk.I is a unique machine created by Dr. Robotnik, and the boss of World 7-S1, Tainted Toadstool Zone. Piloted by the Egg Robo, Robotnik's mechanical assistant, the Egg Shroom combines the technology of Sonic's realm with the fungi of Mario's realm. Designed to resemble a huge Poison Mushroom, the Egg Shroom is protected by a swirling barrier made up entirely of Poison Mushrooms. These mushrooms will gradually be plucked from the barrier and dropped onto the scrolling platforms below in groups of 1, 2, or 3, where they will slide towards the player, until no more mushrooms surround the main body. At this point the boss will be vulnerable, and will drop down to a much lower level, where it will proceed to vacuum up a large number of toxic spores from the pit below, which will