The Black Koopa boss: NORMAL mode is its animation in phase 1 and 2 RAGE mode is its animation in phase 3. The Fight: Phase 1+2: The black koopa will walk forward until coming within 3 blocks of a player. It will then enter its shell and charge at you. You must make it run into a wall first. It will then appear dizzy, allowing you to stomp it. When you stomp it, it flies up (just like king goomba), and shoots down red koopas in pairs three times, before ramming down to the ground and continuing forward. Phase 3: In phase three it will move and animate faster. If a player is within 7 blocks and is behind him, he will turn to face them. If a player is within 5 blocks, he will charge at the player, changing directions only twice. Unlike phases 2 and 1, he must hit walls three times before becoming dizzy again.
Credit to @superpi2 for original theme For SMBS and SMMS