Ah, Cream first appeared in Advance 2 I recall, so choose that one I guess?
Shadow has alien blood. Who knows if he's immortal or not. Black Doom may be. Shadow was created in a lab, not born, so he couldn't possibly have a normal organic lifespan either way. That doesn't mean he inherently would have a higher lifespan either, just that it's not comparable to naturally born creatures.
He never ages in his appearances, unlike the other organic characters in some way(Eggman tends to not have a consistent design, though). But we don't see him much in the future beyond him being sealed away by Omega in 06's story(and it's just an explanation from Omega, not a literal scene of it. Though to be fair, he probably has a literal photographic memory, but who knows how accurate it is when it comes to footage quality).
So could go either way.
Shadow?He doesn't have a Healing Factor as far we know. That puts a damper on any Super-Soldier applications.
Can he live forever?
You mean this one?
Man, I love it even with its unfortunate implications. I actually want to see someone animate it to the tune of Franz Ferdinand's "This Fffire"
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