He first appeared in "Making the Case" as Lincoln's rival in a karate tournament.
In "Overnight Success", when Lincoln has a falling out with Clyde, while Liam and Chad have run away, he decides to invite Artie over to spite him. He lies to Artie about him being his first choice for a sleepover guest, but it was pretty obvious he wasn't since he already crossed Liam and Chad off a list he had for potential guests, and they ran away from his sisters. Before they can do anything, Lucy tells them that she needs a volunteer to act as a body for a practice funeral, and asks Artie how he handles enclosed spaces. Artie may be claustrophobic because Lucy wanted his assistance for the practice, and the mere mention of enclosed spaces causes him to run away.
He appears again in "Lincoln Loud: Girl Guru" making his first voice role. Here, he was the only one at school who tried Lincoln and Clyde's salt and vinegar pies. After having the first bite, he spits it out in disgust.
Artie is a svelte boy with a brunette pixie cut. He wears a yellow sweatshirt with a horizontal stripe on the center, jeans, and white sneakers. In "Lincoln Loud: Girl Guru", he wore a red sweater with a single stripe on it.