You have to go to Fallabor town.
Catch a bunch of luvdisc they can hold heart scale.
Heart scales are only in Pokemon emerald, ruby and sapphire but you can get one if you trade a heart scale from ruby or emerald or sapphire to leafgreen then take it but it will not do anything in the game.
Simply press the A button if a luvdisc is holding a heart scale go to luvdisc and press A press A on Item and choose Take.
you give a guy a certain amount of shards and he will trade it to u
I only found heart scales in Ruby, Sapphire and Emerald but I'm not sure of the other games.
In Pokémon Crystal (GBC), there is no Heart Scale item. The Heart Scale item was introduced to the Pokémon video games in Generation III (3) (Ruby/Sapphire/Emerald). Thus, you cannot get the Heart Scale in Crystal. There is no Generation II-III trading, so there is no possible way to use the Heart Scale in Pokémon Crystal Version, sorry!
theres a couple underwater and one in a rock in lilycove near the water
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you cant get one on leafgreen you have to trade it over from ruby Sapphire or emerald
At first you get them underwater when your done collecting them start catching a bunch of luvdisc because they randomly will be holding a heart scale.
u go to the move deleter at fallorbar town.you need a heart scale.
Ruby, a variety of the mineral corundum, has a hardness of 9 on the Mohs scale of mineral hardness.