Comic Book Guy (CBG) is the common, popular name for Jeff Albertson, a recurring fictional character in the animated television series The Simpsons. He is voiced by Hank Azaria and first appeared in the second-season episode "Three Men and a Comic Book", which originally aired on May 9, 1991. CBG is the proprietor of a comic book store, The Android's Dungeon & Baseball Card Shop. He is based on "every comic book store guy in America" and represents a stereotypical middle-aged comic-book collector. He has become well known for his distinctive accent and catchphrase, "Worst [blank] ever!".
http://en.wikipedia.org/wiki/Comic_Book_GuyWhile Buttercup doesn't seem to have any special superpower different from her sisters, she is physically the strongest of the three girls. In the episode "Speed Demon" it was also revealed that she can fly the fastest out of all of her sisters. In "The Rowdyruff Boys," she has a tremendous disdain for resorting to kissing the boys in order to eliminate them, though willingly kisses a boy ridden with what she feared to be "cooties" in a later episode. Her special ability are shown to be able to curl her tongue. Other signature abilities she displays are Tornado Generation, Ball Blast, Black Hurricane, Green Laser Beams, Energy Orb (colored light green), Thunder Clap (appeared in The Boys are Back in Town), Fireball (rubs her hands till smoke comes out and forms a ball then she hurls it). As a result of the episode "Nuthin Special" canon being questionable, it's unclear if these abilities is unique to Buttercup, despite the fact that she is the only one seen using these abilities outside of that episode. In the anime version, she fights with a big, yellow hammer.
http://powerpuff.wikia.com/wiki/Buttercup