Lol, ASB is a slippery beast.

One thing that just dawned on me that's entirely unrelated to this whole discussion: since the Punk music ended and its effects are over, Carbuncle (and Rex by extension) should have lost the Att/Def boosts. The SpA/SpD boosts were acquired through Carbuncle's use of Psych Up so those can stay, but the Att/Def boosts are donezo.