Duel of 100

The Sammer Guy Tournament is a tournament held in Sammer's Kingdom during Super Paper Mario. Mario, Peach, and Bowser entered it to recieve the Pure Heart held by King Sammer. After 20 fights, The Void grew so large that that Rolling Thwomp had to rush through the gates, plowing through the remaining Sammer Guys, and forcing the player to stop fighting. After the game is finished, however, the gang, now with Luigi, can reenter to fight all kinds of Sammer Guys with unique names.

Winning the tournament will give you, not exactly a Pure Heart, but eight Catch Cards. Each one for Goombella, Koops, Madame Flurrie, the Yoshi kid, Vivian, Admiral Bobbery, and Ms. Mowz.