If you're a fan of SiIvaGunner, then you've probably seen the new Shop Fusion Collab that just dropped today!
I was able to make several major visual contributions to the collab and wanted to share them here! I've got a lot to share, so I'll be posting my contributions for each section individually.
Before I start though, I advise you to watch the collab for yourself! It's a great celebration of shop themes in games with some of the most insanely accurate visuals to match, made by a team of extremely passionate artists.
Before Undertale released, Toby Fox was most known for his music contributions for projects like Homestuck, alongside independent doujin work such as tribute albums. In 2011, in response to jokey feedback saying that much of his music sounded like Touhou music, Toby shared an audio recording of him playing "improvised" Touhou music (audio above) on piano, with commentary paired alongside it. As part of this commentary, he dubbed the boss fight theme "AN APPLE DISASTER!", and declared the theme to belong to the original character "Apple Girlington".
4 years later, just after Undertale's release, soon-to-be SiIvaGunner ripper and Touhou specialist Princess Sylvysprit released an arrangement of this made-up boss theme arranged in the authentic style of ZUN's Touhou music. As you can see, this rearrangement was directly seen and endorsed by Toby Fox!
You can also hear a remastered version of this arrangement on her 2019 album, Touhou: Fraternity of Melancholy, the audio for which is linked above.
Princess Sylvysprit has made an incredible amount of tributes to Touhou and its music in her time online, both for her own projects and others', including the SiIvaGunner channel which she joined in early 2016. If you're interested in reading more about her work, I've previously written about her on NIGHTMARESCAPE 〜Unrestrained HyperCam 2〜 (Final Boss Phase 2)!