Beside the sonic fan dub being one of the funniest things to ever be created , I will be honest sonic adv 2 has VERY HIGH PEAKS and when it his low it his low very hard.
The hero side feels SO CLUNKY TO PLAY and the Knuckles just drag for sooo long ( atleast that how I see the Knuckles stages) the bosses are ok, the golem and first mech boss fight were easy and did not drag too long, shadow and eggman bosses where cool but if you are not carefull the camera might screw you over or the mech controls might screw your movement and the ghost boss was just straight sh't it was so bad .
With that said the Dark side makes up for almost everything, The stages to don't drag on for ages and ages, Eggman stages were actually fun,rouge stages didn't last forever like knuckles, Shadow felt better to control then sonic, my only complaint with the dark side is still when the camera just screws you over and the last tails boss fight was just a bit annoying.
Either way the game is a banger and one of the best ost of all time