Like Cobra Commander from G.I.Joe: A Real American Hero, Megatron from Transformers, Skeletor from He-Man and the Masters of the Universe, and Wrath-Amon from Conan the Adventurer, and other various evil rulers and leaders, Snaptrap leads an army of villains in various attempts to take over the world.
Like the Shredder from the original Teenage Mutant Ninja Turtles cartoon and Rita Repulsa from Mighty Morphin Power Rangers, Snaptrap is whiny and incompetent.
Like Dr. Evil from the Austin Powers series, he dresses up in a white lab coat, comes up with crazy schemes to prove himself instead of listening to his henchmen's clever (and infinitely easier) plans, he throws his henchmen in a shark tank if they fail him, and has an obsession with lasers.
Similar to Megatron from the original Transformers series, he usually blasts someone who disagrees with him or anyone who comes up with plans different than his.
Like Batman's arch-enemy, the Joker, Snaptrap is psychotic and has an insane laugh.
Snaptrap is some what similar to Phineas and Ferb's Dr. Doofenshimirtz, and Meet the Robinsons' Bowler Hat Guy, (before he met Dor-15 A.K.A. Doris) all three villains will use childish pranks as their evil plan, they all want to get their revenge on something that is a big deal to them, and Snaptrap and Doofenshimirtz have problems with their mother.
He is possibly a spoof of James Bond's arch nemesis Ernst Stravo Blofeld, because he wears a suit similar to his.
Like Denzel Crocker from The Fairly OddParents, Snaptrap still lives with his mom.
In the Swedish dub, his name is Smittelinus Skabbsvans, "Smitte" is taken from the Swedish word "Smitta" ("infect"), "Linus" is a name, "Skabb" means "scab" and "svans" means "tail" in Swedish.
In the Spanish dub, his name is Snaptrap el Piojoso (Snaptrap the Lousy or Snaptrap the Nitty).
He has the same voice as Sparky from The Fairly OddParents.
In Forget Me Mutt, Snaptrap's mom calls him a "reject" for unknown reasons.
When they were younger, Snaptrap, Dudley and Kitty had one thing in common: they all wore braces.
It is unknown why Snaptrap is allergic to cheese.
In Snap Dad, unlike The Chameleon, Snaptrap seemed to be fond of children since he doesn't mind being called "Dad" by Dudley. This is also shown in Kid Stuff with Snaptrap's line:"Man I am loving kids. Maybe I should down the stork to get me one of my own."
In Mind Trap Snaptrap goes dumpster diving for food, just like a real life rat would do.
Verminious Snaptrap's first name is derived from "vermin", which is another term for "pest". This is understandable seeing as how rats are considered, among many, to be one. And his last name is obviously a reference to mouse "traps" and rat "traps", seeing how they "snap" down on whatever comes into contact with them.
In Snap Dad, Snaptrap dated Peg Puppy, while he was with her; he began to have strong feelings for her and stole Kitty's ring to propose to Peg, asking her to marry him.
Snaptrap, along with Dudley, Kitty, and Keswick are the only characters to have known families. Snaptrap's family members are: his mother, his sister, and his brother-in-law, Larry.
Snaptrap is the second Nickelodeon villain to be a rat; the first character is the Rat King from The Penguins of Madagascar.
In The Rat Pack, Snaptrap revealed that he always dreamed of being a dancer.
Also, in the same episode (for some weird reason), only Snaptrap's clones had numbers printed on his shirt, possibly to show which was the real Snaptrap. None of the other things that were cloned (namely Dudley) had any number on them at all.
He seems to aspire for a family of his own seeing as he was willing to marry Peg even if it meant giving up a life of crime and being a father, even if it means being a father to Dudley, one of his worst enemies (as seen in Snap Dad).
He has a liking for pudding, as shown in Booby Trap.
He may be the only rat allergic to cheese. It's also possible that he got his cheese allergy at birth.
He does not know how to tie his shoes as seen in The Rat Pack.
He is seen eating ice cream in Share-A-Lair. This could mean that Snaptrap is allergic to only cheese and he's not lactose intolerant.
Snaptrap is known to be a fan of Justin Beaver, an obvious parody of Justin Beiber. This may give us a clue about his psychological condition, and problems, suggesting us he still has a childish nature.
His overall appearance seems to have change over time, ranging from muscular like and tall to a bit shorter and chubby. His voice has also changed (as in Purr-fect Partners, his voice was more cracking than in later episodes).
As shown in a flash back in Snap Dad he likes to read comic books.
Snaptrap has lost the Camp Champ award to everyone else at Camp Itchy-Owie-Boo-Boo twice, when he was a child and in the episode, Snappy Campers. In Snappy Campers, he plans an evil plot to destroy the camp after not winning.
He starts to become less evil in the latest episodes.