>XD
Promote a pawn to a pawn
No, you make a special rule. If a pawn makes it to one end of the board, it can forego promotion and "turn around", marching back towards its owner. If it then is able to reach the other end of the board, something even better happens, (you get two queens, or an automatic win/draw, or you get to move the opponent's king into check).
Please note I am totally kidding.

There once was a rule in which pawns were allowed to promote to pawns but that rule was since revoked. In rare cases it can serve as an advantage. example:
white mates in 1f White plays 1.bxa8(Q)?? (or any other promotion), Black wins with 1...gxh3, when White cannot stop Black from checkmating him next move with 2...h2#. Instead, White draws by 1.bxa8(P)!!, when 1...gxh3 or 1...Kxh3 stalemates White, and other moves allow 2.Bxg2, with a drawn endgame.
taken from http://en.wikipedia.org/wiki/Promotion_(chess) 1/2/08
everytime you promote a pawn in live chess or in turn-based games do you have the selection there that you can promote a pawn to another pawn? i guess no so why ask?

What would be the point of "Promoting" a Pawn to a Pawn? They would not be able to move at all AND they would be completely useless because they can ONLY attack their diagnals!
ADK

I would suggest promote a king should be allowed if the chess rule is changed. So, opponent should catch both kings in order to win a game.
But what if the opponent managed to check both kings simultaneously? Checkmate?

IT SERVES NO PURPose end of converstion. The point of promoting is to get a higher valued piece for a pawn. Not a pawn for a pawn

Three options in this bizzare situation
.A. 1. f8=Q (or f8=R) Stalemate. Promoting to a knight or a bishop is not an option because there's 7 seconds left on the clock and no spare chess pieces.
B. King moves. f-pawn falls and white loses on time. Maybe.
C. 1. f8=f8 Using the reflexive property white keeps the pawn, gaining opposition and promoting next turn. Winning with: 1... Kh8 2.f8=Q+ Kh7 3.Qg7# Looks like promoting to a pawn is the only reasonable option.

No, you make a special rule. If a pawn makes it to one end of the board, it can forego promotion and "turn around", marching back towards its owner. If it then is able to reach the other end of the board, something even better happens, (you get two queens, or an automatic win/draw, or you get to move the opponent's king into check).
Haha a brilliant idea. I agree
Promote a pawn to a pawn, doesn't make sense. There is no promotion, if it remains a pawn. Think about what you are saying. It is illegal. If it were legal to leave as a pawn, the only possible advantage would be for a smothered mate. In other words occupying a space to prevent escape from mate. But even then it would have to be defended by another piece.
XD