Savant - Ascent

Once you have unlocked the 6th soundtrack (Grab attack at full power meter charge) you can earn this achievement by using a grab attack on the Orb that appears in the 'Top Of The Tower' stage.

Do this quickly to avoid the boss fight entirely and unlock Overdrive levels of power.

Here's a gif of me grabbing the orb as fast as possible: http://puu.sh/mTXeW/2efaff9006.gif