eat hearts
i do not think you can but you can take Pokemon to the heartscale guy and see if that move is compatible with any of your Pokemon you give him a heartscale that you find under ground he collects them
By going underground and digging.
You can find them on Luvdisks in Pokemon Emrald and Ruby and Sapphire, and you find them underground in Pokemon diamond
It is used for the move tutor, who teaches you Pokemon old moves that they have forgotten.
Mistralton City the house next to the entrance for a heartscale
None of the Pokemon do, silly! :D you get the heartscale by digging it from the underground. (be careful, their small!! if you go to pastoria, there is a guy who will teach your Pokemon a forgotten move if you give him a heartscale. his house is next to the lake.) *hope this helped*
Dig for it underground. Its rare but it is possible to dig one up
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
You cannot get a Yanma in Pokemon Emerald, as only Hoenn Region Pokemon can be found in Pokemon Emerald.
There is no PalPark in Pokemon Emerald.
Sinnoh Pokemon DO NOT EXIST IN EMERALD!!!
rotom isn't in Pokemon emerald