how evolve feebas in pokemon ruby

i know that him needs to rise a high level of beatuy , but i dont know what is the best berry for him . i tried with the chesto berry but he can not evolve some knows what is the best choice . THANKS ???

You want to evolve him to Milotic? In ruby, the nature has to be either modest, calm or bold as well.
Feed it indigo and blue pokeblocks.

thank you ,I will try ;D

what he means is taht it needs a high amount of beauty to evolve, the contest thing :P

Yes the blue and indigo pokeblocks should raise your beauty up.