Destroy a power gem of size twenty or larger, on Normal or higher level. This is one of the requirements to encounter Devilot. Adjoining, unmerged power gems of the same color also count. Power gems are gems with size greater than one.
Reconfigure FB Neo so holding Start won't trigger system config. Unlock code: highlight Ryu, hold Start, move down to Morrigan, tap ↓ x13 and hold the last tap, then press any button when the countdown timer does not read 10.