You can evolve Riolu with the Sun Ribbon.
Some missions can give a reward. It can be a lunar ribbon.
you get it by completing the special "today's oh my gosh"
If you have Pokemon mystery dungeon explorers of sky after you complete the third special episode your rewarded a sun ribbon
You can get the Sun Ribbon as a reward for completing a special mission in Pokemon Mystery Dungeon: Explorers of Time. The mission is called "The Mystery of the Eggs" and it involves finding Manaphy's Eggs in a dungeon. Once you complete the mission, you will receive the Sun Ribbon as a reward.
you need a sun ribbon and its IQ needs to be 1 star
9866765498 if too long 9866765
find it in a dungeon
To obtain a Lunar Ribbon in Pokemon Mystery Dungeon: Explorers of Time/Darkness/Sky, you must first recruit Uxie, Mesprit, and Azelf. Then, go to Spacial Rift or Temporal Tower to complete a mission given by Celebi. After completing the mission, you will receive the Lunar Ribbon as a reward.
try to go to youtub. if not go to gamefaqs.
you have to have a razor fang and a lunar ribbon because normally they evolve with the razor fang at night
you have to find a sun ribbon which is only available in explorers of time.
get a sun ribbon and train for a while