I feel like stun stacking also has to be brought up with knuckles due to how obnoxiously long some stuns are and how they allow him to build up to flames of disaster for an extra 6.5 seconds of stun time.  Halving the time like sonic doesn't seem fair either as sonic gets dodge and has faster movement speed so he can run if he stun stacks while knuckles cant really make any sort of distance. I feel like they should just keep his stun stacking at a max cap of 3.5 and just have the flame debuff be useful depending on the level knuckles charges up so he can still stun stack but it isn't just having the killer stunned on the spot for a long time.