What kind of stone to make a fighting type Pokemon evolve in Pokemon diamond?

only riolu needs a bone stone. there r no other fighting Pokemon that needs a stone to evolve

Riolu DOESN'T need a bone stone, infact, it doesn't need any stone's! It evolves into Lucario, gradually. Maybe happiness. -PokeFan Boo (visit my Pokémon advice site in a few days, http://pokemondiamondandpearladvice.webs.com/)

it is happiness