He is a light plum-colored fish with light aquamarine fins and lips. He wears a light teal shirt, dark teal shorts, and a green and a dark green hat.
Role in series
"The Incredible Shrinking Sponge"
At the Krusty Krab, finds the mini SpongeBob, and, thinking he is an action figure, takes it to his friends. Meanwhile, the others try to take it from him. Ryan Timmy runs away until all the kids fall into Squidward's workstation. SpongeBob then jumps into Squidward's shirt pocket. Mr. Krabs tells the kids to get their parents' money to buy the "action figure." They look at the customers and run after them.
While Patrick is giving an enthusiastic tourist a "tour" around Bikini Bottom, Ryan Timmy is seen eating an ice cream cone. Patrick's bellybutton eats his ice cream, but he punches Patrick and makes him cough up the ice cream.
"Krabby Patty Creature Feature"
As the Krabby Patty creatures are loose in Bikini Bottom, Ryan Timmy and his family hide on the top of the Krusty Krab sign for protection. He then falls off and starts to eat a part of the zombie on which he lands, saying that it does not taste bad, and mutates into a zombie himself.
This is also the episode where his name is revealed.
While SpongeBob and Patrick are moving Bubble Bass' furniture to his grandmother's house, Ryan Timmy is seen skipping with a skipping rope held by two other kids. He moves out of SpongeBob and Patrick's way as they pass by.
Later, when the bag of furniture starts bouncing down a large hill, it hits Ryan Timmy, and he is later flung off the bag when it suddenly stops.
While Squidward is helping SpongeBob and Patrick in the Mustard Mine, he accidentally sucks Ryan Timmy from the sandbox. Ryan panics and runs around, but eventually calms down when he goes up the escalator.
He is one of the many passengers on the bus Squidward drives. When Squidward sees him eating a Krabby Patty, he grabs Ryan Timmy's patty and throws it out the window. While on the bus, Ryan watches the antics that SpongeBob and Patrick get up to, and he leaves the bus after getting hurt by the two.
Ryan is later seen at the Krusty Krab, angrily trying to order food as Squidward's replacement tries to calm the customers.
He appears as the son of Mable-Monica and Incidental 114. Ryan Timmy and his parents are some of the customers who are scared by Old Man Jenkins' antics, and they run out of the Krusty Krab when Old Man Jenkins slaps Squidward in the face.