Whimsical Full Combo
This trophy is obtained for obtaining a full combo on any song on any difficulty on Performance Mode with the Whimsical modifier applied.
Press triangle to access the modifiers menu. Whimsical is represented by a single question mark, and randomises the blue/red colour of notes in segments where they are close together. It can be found as the first option to the right on the bottom set of modifiers.
This modifier doesn’t really effect songs without stream sections, so many of the easier songs will be unaffected by this modifier.
Credit to HighflyerVII