4 Ludwig's Castle

#4 Ludwig's Castle is the final level in the Twin Bridges area of Super Mario World. It consists of a maze-like small-roofed area, a spike escape, fences with Koopa Troopas climbing them, and a boss fight with Ludwig von Koopa. After Mario defeats Ludwig, he retrieves the imprisoned Yoshi (which is trapped in an egg), and attempts to blow up the castle. However, the detonation causes the castle to rocket into the air, and it crashes into a nearby mountain.

Boss Battle
Ludwig is a fairly simple boss. It starts with Ludwig shooting fireballs at you, all you have to do is dodge them. After that, Ludwig will hop to the other side of the room and get into his shell to attack Mario. Then the process starts over again. To defeat Ludwig, you have to bounce on Ludwig while he is spitting fireballs. 3 hits will be enough to kill Ludwig.