Is there any easier way to evoled with a lower levels for riolu?

To evolve Riolu into Lucario, you typically need to raise its friendship level during the daytime. An easier way to increase friendship is to battle with Riolu, use it in contests, or give it items like Soothe Bell. Additionally, you can use the Pokémon Day Care to level it up while it gains friendship. Just ensure that you check the time of day and keep it in your party for the best results.