Ian Wazselewski is the "class weirdo" who likes to do seemingly strange and disgusting things with his imaginary friend, Moltar. In the show, he has a secondary role. In the movie, he has a fairly large role. Ian owns various creepy and off-putting animals mainly consisting of snakes, rats, insects, and other vermin. He is seen in the first episode of the TV series running for class president against Leonard and Scott, he won by one vote.
Ian is a seen by many to be a disgusting freak and acts as the school know-it-all, at least he used to until Scott Leadready (Spot) arrived. One of the many gross habits Ian posses is that he likes to keep change (mainly quarters) in his ears, making them dirty and covered in ear wax when seen by others. He has an unrequited obsession with one of the girls in the class, Ruth, and even goes as far as giving her assorted chocolates with his pet worms in them on Valentines Day; as she runs away screaming, Ian tries to redeem himself by trying to give her his back-up gift (a real heart placed in jar that he bought from the butcher's).
His mother is the school nurse at Fala D. Roosevelt Elementary School, although she is never shown at her job and makes her sole appearance in the episode "Let Sleeping-Over Dogs Lie". His father is a little league baseball coach, as shown in "Take Me Out of the Ball Game". He also appears in "Let Sleeping-Over Dogs Lie" and "A Dog for All Seasons". In their debut appearance, Ian's parents are shown to be just as eccentric and fun-loving as their son. The film reveals he has an uncle, Dr. Ivan Krank. As Krank does not share Ian's last name, he is most likely his mother's brother.
In the show, Ian is a disgusting weirdo nerd who does disgusting things with his invisible friend, Moltar. He also has a crush on Ruth who thinks he's a disgusting freak. He is also class president by 1 vote. His moms the school nurse, so he thinks he and Leonard have a special bond. A running gag is that is that he doesn't hear things well and does disgusting things with items and trying to start a relationship with Ruth.
Despite being a hero, he does have an antagonistic side like in, an episode where he mocks Scott for having a squeaky toy which belonged to Scott as a puppy. Later, he gives Spot back his toy after he outbids Pretty Boy and Jolly on a rare, mint-conditioned version of the toy on eBay.
In the movie, he has a larger role than in the show. He was grounded for a week for hacking into Buckingham palace and he is revealed to be the nephew of Dr. Ivan Krank, the main antagonist of the movie.
When his uncle trapped Leonard and Spot in a metal cage, Spot had to tell Ian about his identity as Scott. He let them free with his computer hacking skills in exchange for a slimy old chew toy. When Krank arrives, he grounds Ian for the rest of the summer for helping Scott and Leonard escape.
While Scott and Leonard go out and buy stuff, Ian calls his parents and tells them how frightened he is about staying with his uncle but likes it anyway.
He is not seen again until near the end when Krank is turned into a mouse.
- He originally was based on a young lad that Cheri and Bill Steinkellner's daughter, went to school with when she was in the fourth grade. He used to eat school supplies. He was really non-discriminatory. He didn't stop at paste. He also ate parts of his pencil and paper and anything that really you could buy at Staples or Office Max.
- He is voiced by Rob Paulsen
- He likes his Mr. Goiter (his throat bump).
- He hosted a sleepover for his birthday.