evolving feebas

I have an albino feebas I'm trying to evolve, I've read through the wiki info , and I fed it some blue pokeblocks, but it isn't giving me the notification that it can evolve, am I doing something wrong?

You maxed out it's sheen instead of its beauty. You'll need to use a black pokeblock to reset it, then use better quality pokeblocks.

which sort of blocks would you suggest?

The higher quality the better. Pokeblock+ will work more effectively, and pokeblocks made from rarer berries also get it done. I recommend starf berries to blend, but I think others might work as well. I can test on a feebas and update with the number needed. EDIT: I used a feebas with a lax nature(doesn’t affect dry flavor). I used six Pokeblock III (obtained through starf berry) and got the Pokémon in evolution range. I only had the one, so I don’t know how it will work if yours dislikes the dry flavor.