The easiest way to beat this boss is to Rev-roll to the right of the boss and abuse the big hit box, pause the game to force his Invincibility to run out, then unpause to get a hit, repause to abuse invincibility frames, repeat until Blinky is defeated.

Right when you’re about to set up the first hit on blinky (the most consistent RTA method used in runs) you can hit him right when he spits out his tongue, It is only about a second faster and inconsistent so it's not viable for runs, this can also be used as a back up if you get a 5-1 2 cycle.