But I would say that a mimic moves / promotes / does whatever as the rules of the variant it participates in says it does. It is not a standard piece. Usually mimicking is about moving, and things like promotions or royalty are not part of the move. Of course you could define a piece that mimics the promotion of the last-moved piece too. Or even only that, always keeping its own move, but allowed to promote on it (no matter where it goes) when the opponent promoted. Or even promote in its own prescribed way when the opponent promoted. The possibilities are endless. Of course promotion of a mimic would in general make it a non-mimic. (Unless a game has various types of mimics in it.)
A generalization of a mimic is a piece whose move and/or other properties depends in some way on the previous move of the opponent.
Not sure I have seen that poll.
But I would say that a mimic moves / promotes / does whatever as the rules of the variant it participates in says it does. It is not a standard piece. Usually mimicking is about moving, and things like promotions or royalty are not part of the move. Of course you could define a piece that mimics the promotion of the last-moved piece too. Or even only that, always keeping its own move, but allowed to promote on it (no matter where it goes) when the opponent promoted. Or even promote in its own prescribed way when the opponent promoted. The possibilities are endless. Of course promotion of a mimic would in general make it a non-mimic. (Unless a game has various types of mimics in it.)
A generalization of a mimic is a piece whose move and/or other properties depends in some way on the previous move of the opponent.