RazielAre you the biggest Ivy fan ever? Maybe you're a Lash stan? Well thanks to X user cataon1c__, you can customize your hideout with their browser based mod, "Pimp My Hideout!". It allows you to change all of the pictures in the hideout, your play screen, and even the chalk on the ranked chalkboard. Take your favorite fanart, pictures, or whatever suits your fancy and start plastering the walls to your own desire.
You can find the mod and editor here: https://xkitkatcat.github.io/pimpmyhideout/