Wiki Berries get them from the berry master or on route 210
You need to use high level berries. yh what kind of berries list them!!!!!!! from here :
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To evolve Riolu into Lucario in Pokémon games, you need to increase its friendship level during the day. You can feed Riolu berries that boost friendship, such as Sitrus Berries, Razz Berries, or the specific Pokémon Friendship-boosting berries like the Pomeg or Kelpsy Berry. Additionally, playing with Riolu, leveling it up, and keeping it healthy will also help increase its friendship level.
# You have to make the beauty level very high and level it up.
just squish the berries
You don't need to level up, you need to make it have high happiness. You can either keep in your party, battle with it, or make it hold a Soothe Bell, too. That helps a lot. You can also give it berries that would improve friendship, but it decreases a stat. I usually use Tamatos.
make it love you like find a massage therapist and keep getting massages and if it is at a low level you ccan give it stat lowering berries to make it love you
make sure your Pokemon is a high level, and you should have should have some supplys of reviver seeds,oran berries,heal seeds,max elixirs,apples........ good luck defeating dialaga! :) jenytembuneary
The words that make up a high-level programming nlanguage are known as key words or reserved words.
It has to have enough happiness. Level it up enough and feed it berries/foods it likes. EVs also help a lot too.
Dingle Berries
You'll need to make it have High Happiness, then level it up.