In the Safari Zone(Encounter Rate is rare)
in the meadow
You can find it in the Safari Zone or trade it from Platinum, Diamond, or Pearl.
Riolu evolve by happiness during the day.
in the safari zone
You need to evolve riolu which you can find in the safari zone.
you can't find him but riolu (pre evolved form) is in the safari area find him and evolve it
Safari zone.
No one
answer riolu doesnt evolve by level it evolves by care and love
Riolu? Check serebii.net, they should have it.
have po kemon red in
If you don't want to wait 70 days for a Riolu, trade the free Riolu you can get in Diamond and evolve it.