Instructions
Go through the final castle level of World 1 to reach the boss, Larry Koopa.
Avoid Larry's magic wand attacks and do not let him land on you when he jumps. During this fight, the floor breaks up into five separate pillars that move up and down independently. Attack Larry by jumping on his head. Position yourself on a pillar next to him as it rises up. Jump down onto his head as Larry attempts to jump up at you.
Dodge Larry's shell-spin ability that he performs every time you hit him on his head. You can avoid this maneuver if Larry gets stuck between two pillars as they rise up, causing him to bounce back and forth between the two. You cannot hurt Larry while he is performing the shell-spin ability.
Defeat Larry and gain access to World 2 by jumping on his head three times.