Never inherits the Queen's moves from a Crippled Amazon.
For interaction between a Joker and Crippled Amazon, an alternative rule could be:
A Joker who is imitating a Crippled Amazon, can move like a Queen, if he is a Knight's move away from another friendly Crippled Amazon.
And even more extreme: When a Joker is imitating a Crippled Amazon, and a Knight's move away from another friendly Crippled Amazon, then that other friendly Crippled Amazon can move like a Queen.
If we both agree that this is more exciting then we could accept these rules.
This is a game between Martin0 and evert823 with additional pieces.
Crippled Amazon:
Moves and captures like a Knight. When two Crippled Amazons of the same colour are separated by a Knight's move, they can temporarily move, capture and give check like an Amazon (Q-N compound) until one of them moves out of such a position or is captured.
This means that if you lose one Crippled Amazon, the remaining one is reduced to a Knight. I suspect this to be a substantial loss!
Joker:
Moves and captures like the last piece with which the opponent has moved. But does not inherit any special functions. A Joker who is imitating a Crippled Amazon, can move like a Queen, if he is a Knight's move away from another friendly Crippled Amazon. (But that other Crippled Amazon does not get the Queen's move from the presence of the Joker.)
A Joker who imitates a pawn can move 2 squares if he is on his 2nd rank.
Guard:
Moves and captures like a King but without Royal function.
While castling, the King moves three squares whether it is King-side or Queen-side castling.
Promotion is not limited to previously captured pieces.
Martin0 is white. Enjoy the game!