Perhaps it's fair game to be covering demo discs for non-Sega systems so long as they have at least one demo for a Sega game? After all, the North American Nintendo GameCube Preview Disc has a page on Sega Retro on the basis that it has demos for Sonic Adventure DX and Billy Hatcher, and Sonic Retro has pages covering demos of Sonic Adventure DX and Sonic Heroes that were included on demo discs. I query because there are instances where there are discs only available for kiosks in game stores, such as a Japanese GameCube kiosk disc known as "Gekkan Nintendo Tentou Demo 2002.12.1", which was created solely for kiosk use and was meant to be returned to Nintendo after it was used, however two copies of the disc leaked into the public, and one of them was preserved and released by Forest of Illusion back in October 2019. Of the three playable demos on the disc (the other two being The Wind Waker and Mario Party 4), one of them was... Sonic Mega Collection Taikenban, a demo version of Sonic Mega Collection which only allowed users to play Sonic 1, Sonic 2, Sonic & Knuckles and Sonic 3D, with the demo halting after 5 minutes of play. There isn't really anything else to it, but I would love to make a page for this on Sonic Retro solely on the basis that "it exists". There's also another Japanese GameCube demo disc I would like to bring attention to, that is being the Summer 2003 edition of the Nintendo GameCube Soft eCatalog, which I actually do own a copy of as I was able to buy one from a Japanese eBay seller for a reasonable price about a year ago. This one not only has a demo of Sonic Adventure DX that is different from the one on the American Preview Disc, but also has something called the "Sonic Team Joy Carry Collection", which is a collection of downloadable Game Boy Advance mini-games. Two of the mini-games are demos of Puyo Pop and ChuChu Rocket that would later be included as unlockables in Billy Hatcher, and the third being a version of the Tiny Chao Garden that's based on the version in Sonic Advance 2 and comes pre-loaded with a Tails, Amy or Knuckles Chao that can be sent to Japanese versions of SA2B or SADX. Being a special app made for a demo disc for the purpose of distributing Sonic Team-developed demos and Chao, it's worth documenting at least.