Is Meccha Chameleon on Xbox or Game Pass?

No. Meccha Chameleon is not on Xbox (Series X|S or Xbox One), and it is not on Game Pass. The game — commonly misspelled "mecha chameleon" — ships only on Steam for Windows PC, and no Xbox release or Game Pass deal has been announced. If someone tells you it is on Game Pass, they are mistaken.

Is Meccha Chameleon on Game Pass?

No. It is not in the PC Game Pass or Console Game Pass libraries, and there is no announced plan to add it. Because it is a 5.99 USD indie game on Steam, the way to get it is to buy it there — there is no subscription that includes it right now. You also will not find it via Xbox Cloud Gaming (xCloud).

Will it come to Xbox later?

Nothing is confirmed. The game blew up fast — around 340,534 peak concurrent players and roughly 7 million copies sold — so a console version would make commercial sense, but the developer has not announced an Xbox port or a date. Treat any "Meccha Chameleon Xbox release date" claim as an unverified rumor until the developer says otherwise.

A practical hurdle: the core loop depends on precise mouse-based color sampling, which is fiddly to translate to a controller, so an Xbox version would need real design work rather than a quick port.

How to play it without an Xbox

Right now the only legitimate option is a Windows PC via Steam at 5.99 USD — full details on the price page. It is also Playable on Steam Deck. See every platform's status on the platforms page, or start with what is Meccha Chameleon and the free camouflage palette matcher.