This was a "Dexter's Laboratory" short that was shown in theaters before "The Powerpuff Girls Movie". It was eventually released as part of the latter seasons, which makes perfect sense. I know a ton of people hate this, mostly because it comes off as stupid. It features Dexter getting chickenpox and Deedee telling him that if he scratches them, he will turn into a chicken. He straps himself up to stop himself from scratching, but breaks through it and does in fact turn into a chicken.
The later seasons were definitely forgettable and pale, but this was just good for a short. The animation really does get a bump here. I just find it funny to see Dexter scratching himself and going insane and especially being strong enough to break through those straps. Yes, it's technically stupid, but I do in fact enjoy it. You can still ignore post Season 2 "Dexter's Laboratory" episodes. It's certainly better than most of those episodes. ***
The later seasons were definitely forgettable and pale, but this was just good for a short. The animation really does get a bump here. I just find it funny to see Dexter scratching himself and going insane and especially being strong enough to break through those straps. Yes, it's technically stupid, but I do in fact enjoy it. You can still ignore post Season 2 "Dexter's Laboratory" episodes. It's certainly better than most of those episodes. ***