I've tried really hard to find a slowpoke with curse to breed with a snorlax, but it seems none of the slowpokes bred or caught have anyway to get curse as it is a starter move. Is there a way to get Curse?
Yes, there is a way.
Take Slowpoke to the Move Relearner, who can be found in a house in Dendemille Town. He will teach your Slowpoke Curse if you give him a Heart Scale.