You can train for an attack whenever, but it takes several days for some attacks. Also there is a limit of 28 attacks. There are a lot. So choose carefully. Of the starter attacks, you may only have three.
If you choose to transform in any way at all
your HP is back up to full. A transformation is not considered an
attack. When you do transform your KI goes down each time your turn
comes up.
When you ar at a certain Power level that represents a Level. You
will not see the level in your profile but you will know what attacks
you can use by the power level.
Attacks have different colors because there are
different types of atacks.
White is Offensive attacks.
Green is Defensive attacks.
Blue is Power ups
Yellow is finishers.