Relationship with Penelope Pitstop
His character is really (and physically) Penelope Pitstop's guardian, Sylvester Sneekly, in disguise. His main goal in the series is to do away with Penelope so he can take her fortune for himself in 1914.
In the episode "Big Top Trap", he actually reveals that he's the Hooded Claw to Penelope, but she doesn't believe him, thus still leaving her in the dark.
At the end of each episode, the Hooded Claw always vows to the viewers and the narrator that the next time, he would finally get rid of Penelope and take her fortune.
Interference by the Ant Hill Mob and Chuggaboom
He has also made attempts to get rid of The Ant Hill Mob because of their constant interference with his plans to kill Penelope. He often refers to them as "little pests", "ragamuffins" and "those pint sized pests". Sometimes, he would use attempt to get rid of them, like trying to stop them by giving them odd liquids to drink, tickling http://hanna-barbera.wikia.com/wiki/Chugga-Boom, or trapping them. (used to be called, http://hanna-barbera.wikia.com/wiki/The_Bulletproof_Bomb)
The Bully Brothers
The Hooded Claw has two minions, the Bully Brothers, who are the only visible characters who know that Sylvester Sneekly is, in fact, the Hooded Claw. The Bully Brothers would normally do whatever he told them to do. However, there have been occasions in which the Bully Brothers would ask if they could do something else, such as "We want to go to Coney Island" or "While we're here, may we look for acorns?" Comments such as these would annoy the Hooded Claw and he'd threaten them, which would always get the brothers back to helping him get rid of Penelope.
The Narrator's Interference
Whenever the narrator (who also knows that the Hooded Claw is Sylvester Sneekly) would verbally interfere with the Hooded Claw's plans, the fiend would usually try to look down upon him by calling him "wise guy", "a busybody" and "nosy", thus breaking the fourth wall.
Disguises and Perils
The Hooded Claw is a master of disguise's, (which he mostly uses to lure Penelope into another of his traps). At first, Penelope always has no idea that it's the Hooded Claw until he reveals himself to her. His disguise's include Penelope herself, Clyde of the Ant Hill Mob, one of Chugga-boom's spare tires, an abominable snowman, a lumberjack, a lumber tycoon, the Earl of Crumpet and a Chinese detective.
The Hooded Claw's perils are complex, clever and secure (some are described by the Claw as "doozies"). However, Penelope is always able to escape from them, using her intellect and special talents. Her escapes frustrate him and force him to put her into another peril.
- "I'll get you, Penelope Pitstop!"