Double Pounder

Double Pounder is a Bowser Jr. minigame in Mario Party 9.

Introduction
Bowser Jr. does a taunting dance from his platform. The camera then zooms out to show the players as well.

Gameplay
The pair must try to simultaneously Ground Pound switches of the same color. In order for that color switch to be deactivated, the players need to have almost perfect synchronicity. Whenever a switch is deactivated, lava spouts in the background, then hardens into a metal platform, which makes Bowser Jr. look nervous. If all four sets of switches are deactivated within 30 seconds, the players win.

Ending
If the players are successful, Bowser Jr. will run off into a tunnel, and the players will hop along the platforms, giving chase.

Trivia

 * The gameplay of this minigame is similar to The Great Deflate, from Mario Party 4.
 * Double Pounder is a pun on "double header".