Keirin

Keirin is a Cycling Event that appears exclusively in the Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games. The aim of this event is to be the first to cross the finish line in the fastest time. The starting record for this event is 10.540.

In the game's story mode, Keirin appears as the second part of the fourth challenge of Girls Episode 2, Peach in a Pinch, in which Blaze must beat three Blaze Fog Impostors in it, as well as in Balance Beam and Archery (Individual). It also appears as the second part of the challenge of Girls Bonus 1, An Innocent Request, in which Amy must beat Blaze in it as well as in Archery (Individual) and Omnium.

Gameplay
In this event, the player must complete the final sprint of the event by quickly tapping the A Button to sprint and cross the finish line faster than their opponents. The faster the player taps the A Button, the faster their character will sprint. Once all of the characters have crossed the finish line, the player will then be shown a series of photos showing who won the race. The photos initially start off showing just before the finish line was crossed, and then regularly approach the finish until the first character crosses the finish line. Once that character's photo has been shown, the photos then jump to the positions of the remaining characters, regardless of whether the time between each is equal. After the photos reveal the characters' positions, the times are given, with the placement order being given by the photos.

Controls
1) Dash: Tap the A Button repeatedly.