How to Beat Bowser in Mario Party 5

Defeat all the Mechakoopas by jumping on them or throwing them.

Avoid the fire rings that appear after the Mechakoopas are defeated and that move randomly around the screen.

Try to stand on the cracked tile while avoiding Bowser's fire breath attack. He will eventually jump to where you are standing.

Keep avoiding Bowser's fire attack while staying on the cracked tile. After he jumps on the tile three times, Bowser will fall through and become trapped.

Avoid the capsules Bowser throws at you.

Wait for Bowser to use his fire breath attack again and dodge it. Any capsules hit by the attack will start to glow.

Pick up a glowing capsule and throw it at Bowser. Hit him five times and he'll be finished.