To earn this achievement, "Up And Coming", you must play at least one ranked match.
To find this mode, on the Main Menu, select Xbox LIVE BATTLE, then select the first option, which is Ranked Match.
Chose your character, find a quick match, and you will eventually be set up with an opponent. Then go through the match as normal. It does not matter if you win or lose; as long as you play through the match from beginning to end, the achievement unlocks whether you win or lose. That's all there is to it!
Have fun and good luck!