Disney
Outside of Harry Potter, Disney is one of Irvin's greatest loves - so much so, that his entire 21st birthday party was themed around it. When there is an occasion that calls for it, Irvin does cosplay Disney characters. And somehow, starting around 2013, an awful lot of occasions seemed to call for it! Plenty of Irvin's themed birthday parties ended up featuring Disney costumes, as did a few Halloweens and every Mermaid Parade from 2014 onwards.
In 2018 and 2019 (and the opening months of 2020) Irvin had a glorious new outlet for his love of Disney: a dance party known as Disney DJ Night, as well as concerts of the Disney cover band The Little Mermen. Each of these outings called for a Disney costume, and Irvin took the opportunity to create many new ones he'd been meaning to do. There was the interesting added parameter of needing costumes one could comfortably dance in all night long - Irvin is confident that he has cosplayed just about every scantily-clad musical Disney character available at this point! These events resumed in 2023, though in much better ventilated venues where Irvin could wear outfits that actualyl covered some skin.
Irvin's favorite Disney movie is Hercules, so there are a lot of cosplays from that film present. The Little Mermaid is over-represented due to the Mermaid Parade, and due to Irvin's complete obsession with Ursula (who was his cosplay goal for many years, until finally being realized in 2016). Beyond that, there's lots of odds and ends, with a focus on the Disney Renaissance because Irvin is, after all, a '90s kid. Below is a list of cosplays by movie.
Other Animation
Animated Canon
Cinderella: Cinderella
Peter Pan: Peter Pan
Sleeping Beauty: Maleficent
Atlantis: Kida
Lilo & Stitch: Lilo
Tangled: Mother Gothel
Frozen: Hans
Zootopia: Gazelle
Pixar
Disney Channel
Other Disney
Enchanted: Narissa
A Goofy Movie: Max Goof
The Muppets: Miss Piggy
Sky High: Will Stronghold
Who Framed Roger Rabbit: Jessica Rabbit