Paper Mario: Color Splash

WARNING: THIS THREAD CONTAINS MAJOR SPOILERS FOR "PAPER MARIO: COLOR SPLASH". IF YOU WISH NOT TO BE SPOILED, TURN AROUND NOW!

Anyway, for those of you who have beaten the game (or just ignored the message above), you know that the final boss of the game is Black Bowser. During the first phase of the fight, you fight Black Bowser like normal. However, once you've depleted enough HP, the black paint will begin to be coming off of Bowser's face, and then a cutscene will show Bowser looking around, wondering where he is. He even asks Mario what he's doing here and if Peach is with him. That's when the black paint begins to ooze up his face once again, this time powering him up even more so! However, after you defeat the second phase, having Huey absorb all of the black paint, Bowser will still have no idea what happened!

It never directly states in the game, but it's heavily implied that Bowser was being possessed by the black paint, as if the black paint is a sentient being Bowser accidentally summoned...

So, what do you think? Do you think Bowser was possessed throughout the events of this game?