Hiya rchityal and welcome to Aquariumadvice.com
Scales poking out like a pinecone are only one of the possible symptoms of dropsy. Its quite possible he does have dropsy, especially since the peas did not appear to work. Did he poo at all after feeding him the peas? If so, what did it look like?
Dropsy is not a disease in and of itself. Rather, its a sign of internal organ failure cause by something else. The kidneys start shutting down and the fish cannot remove liquids from their system. Consequently, one can medicate but theres no guarantee it will work
Do go visit this page and click on "dropsy": http://www.fish-disease.com/diseases.htm
. It will give you some more info on at as well as possible treatments.
Also, I'm going to move this post to the Unhealthy Fish forum.
aka Cycling Guru and the Ich Slayer
*glares at Terry and QTOFFER*
Card carrying member of FTAS & GCAS.