Quick Xbox answer
If you searched for MECCHA CHAMELEON Xbox, the safe answer is that this guide currently plans around the Steam PC version. An Xbox release, Xbox Series version, Game Pass listing, or console store page should not be treated as confirmed until an official source names it clearly.
This matters because MECCHA CHAMELEON is a multiplayer room game. If one friend buys on a platform that cannot join the rest of the group, better room setup will not solve the problem.
What would confirm an Xbox version?
A real MECCHA CHAMELEON Xbox confirmation should come from a developer announcement, an Xbox store page, a Microsoft listing, Steam news that names Xbox, or another source controlled by the developer or platform. Reposted screenshots, keyword pages, or short videos are not enough.
Xbox, console, and crossplay are separate questions
A console release would answer where the game can be bought. Crossplay would answer whether Xbox players can join Steam PC players. Those are different features, and both need official confirmation before a mixed platform group should buy copies.
For the broader console status, read the PS5 and platform guide. For mixed-platform play, use the crossplay guide.
Xbox FAQ
Is MECCHA CHAMELEON on Xbox?
Steam PC is the confirmed planning baseline for this guide. Xbox support should wait for an official listing or announcement.
Is MECCHA CHAMELEON on Game Pass?
This guide does not treat Game Pass as confirmed without a Microsoft or developer-controlled source.
Can Xbox and Steam players join the same room?
Do not assume that. Crossplay is separate from being multiplayer on Steam.