Riolu evolves based on its happiness, so it could evolve at any level. Raising its happiness can be done by methods including but not limited to: Leveling up, giving it vitamins (Carbos, Protein, Iron, etc.), walking/running/biking/Surfing with it, not depositing it, not placing it in the daycare, not trading it, not letting it faint.
level it up at day
It evolves at level 30, but it does need to be any season apart from winter.
It evolves out of happiness, not level. So, fight with it a lot, give it berries, massages, etc
To evolve Riolu to Lucario you must first obtain enough happiness, then level it up.My advice to evolve Riolu is to go down cycling road, don't use repel though because you have to level it up so you can tell when it has enough happiness.That's how to evolve Riolu into Lucario.Riolu evolves into Lucario as soon as it reaches maximum happiness. You can do this by giving it poffins that it likes, walking around with it holding a soothe bell (Pokemon mansion), battling with it, or by giving it massages in Veilstone City.Riolu evolves when you have maxed out your friendship level with it.
Its friendship needs to be atleast 220 (max is 225), and level up during the day time.
Riolu evolves at maximum happiness, not at any specific level.
Level 21. Becomes Unfezant at 32.
Blitzle evolves at level 27. Hope I helped
it evolves at lelvel 89
level it up at day
It evolves at level 30, but it does need to be any season apart from winter.
cottenee and petelil
riolu evolves when he is really happy
level up with happiness value at 220 during day
It evolves out of happiness, not level. So, fight with it a lot, give it berries, massages, etc
Use a Sun Stone on it.
Riolu does not evolve at a specific level, its evolution is related to happiness. While levelling up does increase happiness, in theory a Riolu can evolve at Lv2 if happiness is increased by other methods.