Joystiq [Nintendo]

Who knew that a simple concept like the Shooting Watch, a controller that measures how many times you can tap a button in 10 seconds, would go on to sell over a million units? This year marks the 20th anniversary of the yellow device's debut, and to celebrate, the Hudson Caravan has been touring Japan, selling limited edition merchandise and hosting button-tapping contests. Takahashi Meijin's 16 presses per second set the pace.

Hudson manufactured a commemorative batch of 10,000 Shooting Watch systems earlier this year, but they were all sold almost immediately. Upset that he wasn't able to grab one, homebrew developer Retrohead created his own Shooting Watch game for the DS. Just like the real thing, it counts the number of times you can push the A button in ten seconds. If you're fast enough, the on-screen watermelon will explode!

Shooting Watch DS has four other diversions -- clock, stop watch, three slots, and four slots -- all of which are significantly less fun than the titular mode. Keep your thumb rigid and tap past the post break for screenshots of the homebrew game. We've also embedded a video of Takahashi Meijin using his button-pressing skills to blow up watermelons!