What does riolu evolve into?
Riolu does evolve, but first, you MUST have full bond with it.
Keep it at the top of your party, and try never let it faint. You
can also use Protines, PP up, HP up, Poffins ect. Also, try walking
with it for awhile, it will grow to love you. The more battles it
wins alone, the happier it'll become. Say if it's level 10, you
would want to go to a spot in the region your in with Pokemon 10
and under. When it grows up to 20 or so, move a little farther from
the spot you where at.
I traded a Riolu at level 24 to my Heart gold, and by the time
it evolved, it was level 60. For it to evole, it depends how well
you care for it and love it. Chanssy and happini, Bonsli, Pichu and
a few others are the same way.
For HG/SS/, go to golden rod city, and go up the block from the
PC and take a right and go down to the little yellow house. Talk to
the girl (the bigger one, not the little kid) and she will examin
your Pokemon you have up first in your party, and see if it hates
you, or adores you. Another way is to talk with your Pokemon. If it
gives you a heart, your getting a close bond with it. If it says
it's regarding you with adoritation, your bond with it is Far
greater than before.
Hope I helped!