Mummipokey
Mummipokey is the second boss in World 2 of New Super Mario Bros. He is a mummified Pokey.
In this battle, Mummipokey pops out of the ground at different places throughout the battle. Mario or Luigi must jump on its head three times to defeat it and gain access World 3. The height of how far Mummipokey protudes from the ground varies, ranging from 2 to 5 segments, including the head. Sometimes Wall Jumps are required to get enough height to land on its head. He can also spit out a projectile ball at Mario.
Access to World 4 can be earned if Mummipokey is defeated while Mario or Luigi is in their mini form. However, because the Mini Mushroom causes the player to get both smaller and weaker, they must Ground Pound Mummipokey to apply damage at all.