Of the more than 800 Pokemon that exist there are some that are more popular and better known worldwide than others. We have a good example in Lucario, the Fighting and Steel type Pokémon that is part of the fourth generation saga, which has recently been incorporated into Pokémon GO.
Only a small part of the Pokémon from the Sinnoh region are available in the successful mobile game, but the good news for all those Lucario fans is that he and Riolu, his pre-evolution, have joined the game and can be yours
However, the way to capture them is not so simple and only depends on luck, because Riolu only appears in the ten-kilometer eggs, among which are many other Pokémon from previous generations or even Shinx.
If you are lucky enough to have a Riolu, then you will need 50 of their candies to evolve it to Lucario. For this you will need to obtain more Riolus through eggs, walk with him as a partner or use Rare Candies, there it will already depend on the method by which you want to choose.
By the way, I want to recommend to you this great post about how to turn off AR in Pokemon Go, check it if you wanna know.
Note that the maximum amount of combat points Lucario can have with a coach level 40 is between 2,319 and 2,703 PCs, while the fast attacks he can learn are Counter and Bullet Fist and the charged attacks are Blaze Focus, Shadow Ball and A Bocajarro.