Bowser's Block Party

Bowser's Block Party is a boss minigame from Mario Party DS. In it, players fight Bowser after he uses his Megamorph Belt to become Blockhead Bowser. Part of the minigame's name is a play on "block party."

Gameplay
The player gets five hearts (served as a Health Meter) while Bowser only has three. First, he turns into a spinning top and spins around the arena, shooting fire from the Golden Bowser Block. After a while, he cloaks himself in fire. Eventually, he stops, the flames dissipate, and falls over. The player then punches or kicks the Golden Bowser Block five times to defeat that form and turn him into his next form.

In his next form, he becomes a large cube and moves like a Tox Box. After moving, he shoots fire from Bowser Tiles on his side. The player must punch or kick the Golden Bowser Block five times when it comes to the ground.

In his last form, he becomes a snake-like trail of blocks, with the normal Bowser Blocks as a body and the Golden Bowser Block as a head. It moves around the outside and the Bowser Blocks shoot fire. The Golden Bowser Block is at first covered in fire. When it stops, it shoots fire from its side, and stays uncovered for a moment. At that time, the player must punch or kick it five times.

After losing all three lives, Bowser turns back to normal, collapses in defeat, and is crushed under a cube of blocks similar to Blockhead Bowser's second form. The player beats Story Mode, unlocks Triangle Twisters, and obtains the Bowser's Megamorph Belt trophy. The player will also get the character's badge and figure.

Rewards
For each win in Free Play, they will receive a trophy based on how many times the minigame is played:
 * One Time: Bowser's Megamorph Belt
 * Two Times: Electromagnetic Generator
 * Three Times: Bowser Jr.'s Chair
 * Four Times: Bowser's Chair
 * Five Times: Bowser Cube
 * Six Times: Beaten Bowser

Controls

 * – Move
 * – Jump
 * – Punch
 * → – Kick
 * → – Hit ground
 * / – Move camera
 * – Change view

In-game text

 * Rules – "Avoid Bowser's attacks after he transforms into Blockhead Bowser. then wait for your chance to strike his golden weak spot!"
 * Tips – "Bowser will stack his blocks in different ways, and each of his forms has a different attack. Study his forms carefully to know his attacks!"

Trivia

 * This is one of the two minigames in Mario Party DS where the characters are or appear to be normal sized, the other being Crater Crawl.
 * In this minigame's case, this is because of the cutscene after finishing Bowser's Pinball Machine. When the Minimizer is broken, the Mario crew returns to their normal size.