MELTY BLOOD: TYPE LUMINA

This one is tricky if you did not do the tutorial first to understand game mechanics.

To earn this achievement you have to do a normal 2 round match. When you select to play vs the CPU set the difficulty to 1 and then rounds to 2. You can spend the first round building up your 3 bars of meter. Make sure you do not do any Moon ex moves or any super moves.

Once you have full meter you need to let the CPU defeat you. When the opponent is on match point (the need one round to win) you will get a 4th bar of meter at the beginning of the round. Simply win the round with a full 4 bars of meter and full moon gauge to earn the achievement.

Achievement pops right after the round ends.

Step one: Start a vs cpu match with lvl 1 cpu
Step two: Win the first match
step three: Let your opponent win the 2nd match while you spam Down+X+Y to charge your stuff
Step four: Win the tiebreaker round without spending your moon or bar gauges

I know Legendary J man already wrote a guide, and his guide is perfectly good, I just figured it can't hurt to have a more direct solution available as well