Dream Boxing is a Dream Event that appears exclusively in the Nintendo DS version of Mario & Sonic at the Olympic Games. It is set in the Fighting Arena. The aim of the event is to knock out the opponent. It is unlocked by placing first in the Meteorite Circuit.
In this event, the player initially competes against a random opponent, and depending on their placement in that match, will either proceed to a championship match between the two winning characters or a third place match between the two losers. Each match consists of up to two timed rounds, depending on whether a character gets knocked out in the first round. In each round, both characters have a Health Meter, which is shown on the top screen. The aim of the event is to deplete the Health Meter to cause the other character to go down. The player is able to do this by landing punches on the other character. They can perform a straight right punch by pressing , which can be powered up to a right hook by pressing up on the control pad or a right body blow by pressing down, and a left jab by pressing , which can be powered up to left hooks and body blows using the same additional commands. Over time, the Special Meter on the Touch Screen will fill, and will grant the player the ability to perform up to three Special Punches by pressing . Each character has their own unique special effect for the punch, though they all perform the same function identically. If the opponent's Health Meter is full enough, they will be able to also press to enter a showdown mode, where , , or must be pressed repeatedly to allow the character who pressed the most times the fastest to punch. Alternately, the character performing the punch may be able to perform it straight away or have it blocked by the opponent. A successful Special Punch will cause the other character to immediately be knocked down, regardless of their current Health Meter level. The player is also able to block other punches by pressing or to guard, or by pressing either left or right on the Control Pad at the same time as their opponent punches to block and counter their attack. If the Health Meter entirely runs out, the player will be knocked down and must repeatedly press to fill a heart gauge that will allow them to get up and begin fighting again, refilling half of their Health Meter. During the time that they are down, their opponent will also be able to heal slightly. It gets progressively harder to recover the more times the player gets knocked down. If they fall down three times or do not press the button enough times within the ten seconds allowed, they will lose the match, allowing the other character to win.