Is my koi pregnant or sick with dropsey?

[WendyO]

 

[Colin_T]

dropsy (identified by the scales sticking out from the body).
euthanise it

 

[emeraldking]

That's definitely dropsy. No doubts here! And it has gone quite far already. This koi won't get better. Like Colin has already advised, better euthanize it. Sorry to say so...