The games you mention are Dexter's Laser Lab, Dexter's Labyrinth and Dexter MixMaster, by developers NetBabyWorld. Those games were originally their own game without the Cartoon Network branding. Labyrinth was based on Ninja Girl 1 and 2 and Dexter MixMaster was originally Tune Inn (that's why this one felt a bit off).

Since they were Shockwave based games they're not playable on modern browsers but they're playable with the Flashpoint Archive project. Huge timewaster, be careful. Better look for the games on YouTube :)