Boxing (Mario & Sonic at the London 2012 Olympic Games)
From the Super Mario Wiki
Boxing is a Contact Sports Event that appears in the Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games. The objective of the event is to knock out the opponent using the strongest punch.
In the game's story mode, Boxing appears as part of the second and fourth challenges of Wild Ones Episode 2, Corner the Koopa King!, in which Knuckles must beat Bowser in it along with in Tennis (Singles) and Javelin Throw in the second, and Vector must also beat Bowser in it along with Weightlifting and Double Trap. It also appears as part of the first challenge of Wild Ones Bonus 2, The Life of a Minion, in which Bowser must beat Knuckles in it along with Hammer Throw, Javelin Throw, Football and Wrestling - Freestyle.
In this event, the player must initially play a semi-final match, with the result of that match deciding whether the player goes through to the final with the other winning character or a third place match against the other losing one, although the player only plays one round in the story mode medley version of the event. The event starts with the two characters preparing to punch each other, with a gauge appearing onscreen for each character which gradually fills up over time. As the gauge fills up more, the character will be able to perform a more powerful punch which gives their opponent less time to react and counter punch. The player must press the A button when the gauge is mostly full to be able to perform a punch powerful enough for a knockout. However, if the other character punches first, the player will have a short time to react by quickly pressing to perform a counter punch, which will subsequently knock out their opponent. If the player fails to press the A button in time, their character will simply be knocked out by the other character. If both players fail to punch in time, both of them will get dazed and the process repeats until there's a winner. Espio acts as a referee in this event.
1) Punch: Press the A Button.
Whoever punches (A Button) with the fullest gauge wins.