The Idea of Egi glam is long dead, they have multiple versions of them in game you can fight, i remember a smn fight against sephirot egis but even that was too much effort to add them as a glamour. I was really hoping that Carbuncle was Savage mount but we got a reskin of the O4s snake and the Firebird ... which is easier and it kinda makes sense as you see it in P8s, but feels very underwhelming.

So yea ... in best case you see it in Mogstation because SE loves their carbuncle merch.