While there is no official "Pokémon Iris" game by Desto, the term often connects to two things in this niche:
Detailed character lore and battle statistics can be further explored on the Iris (anime) Fandom page Bulbapedia entry for Iris pokemon xxx 4 desto iris
Known for her catchphrase "You're such a kid!", her anime portrayal was initially polarizing due to her frequent bickering with Ash. While there is no official "Pokémon Iris" game