Despite being a villain, he helped Timmy a few times (in the episodes Momnipresent, Wishology, Timmy's Secret Wish!), and in the tenth season, in two episodes, he was friendly to Timmy and the other main characters.
Dark Laser is a parody of the Star Wars character, Darth Vader. His character inspiration is due to the fact that Butch Hartman himself is a Star Wars fan, and that his character is an obvious parody of the iconic villain Darth Vader of the same franchise, as is the fictional franchise that Dark Laser is from, Space Wars. Many of Dark Laser's minions are also modeled after Star Wars droids and Stormtroopers.
Dark Laser shares things with Emperor Zurg from Toy Story 2; both are toys and both are parodies of Darth Vader.