Thonky.com's Super Mario World Walkthrough

How to defeat King Bowser Koopa in Super Mario World to rescue Princess Toadstool and Yoshi's friends in Dinosaur Land.

Phase 1

Bowser flies left and right, moving slightly up and down in his Koopa Clown Car.

Sometimes Bowser stops, disappears into the Clown Car, then throws two Mechakoopas out of it. You have to stomp a Mechakoopa and pick it up, and throw it upward so that it hits Bowser as he flies past. You can't throw the Mechakoopa straight up at the Clown Car, because if it hits the propeller or the underside of the Clown Car, it will just bounce off and not hit Bowser. Instead, throw it upward so that it goes above the level of the Clown Car, such that Bowser will fly under it so it crashes down on his head, or Bowser will fly toward the Mechakoopa and crash into it with his face.

Phase 2

After you hit Bowser enough times, he swoops away from the screen, then toward it. Flames fall down from above, so make sure not to let them fall on you. Stand between the flames until they disappear.

When the Clown Car reappears, Princess Toadstool throws a Super Mushroom at you, then Bowser reappears and starts hovering over you, and will follow you whenever you go to the left or right.

You might want to lure Bowser to the left or right side of the screen, because he will eventually stop, and the Clown Car will turn upside-down, and a Big Steelie will fall out and roll toward you. If Bowser is near the side of the screen, you have more room to jump over it. Make sure not to be under the Clown Car when Bowser stops so that the Big Steelie won't fall on you, then jump over the Big Steelie as it rolls past. But be careful not to hit the propeller as you jump.

Eventually, Bowser will throw Mechakoopas that you can use to hit him like you did before, but you will have to move left or right to make Bowser fly into the Mechakoopa this time.

Phase 3

After you hit Bowser enough times, he once again swoops away from the screen, then toward it. Flames fall down from above, like before.

When the Clown Car reappears, Princess Toadstool again throws a Super Mushroom at you, then Bowser reappears.

This time, the Clown Car has an angry face, and Bowser tries to stomp you with it, bouncing left and right.

Sometimes he stops and throws Mechakoopas like before, so stomp and throw a Mechakoopa upward and try to hit Bowser with it like before.

After you hit Bowser enough times with Mechakoopas, his Clown Car will explode and fly away. Congratulations! You won! Enjoy the ending! If you are playing the Super Nintendo version, you have press Reset when the screen shows "The End" (or, if playing on Nintendo Switch Online, press ZL+ZR and choose "Reset Game"). If you are playing the Game Boy Advance version, press Start when the screen shows "The End", and you can save the game.