Riolu doesn't evolve at a specific level but it evolves through happiness.
level 30
Get it to level 32.
Level 22.
At level 30
Goldeen evolves at level 33.
leaf stone
Snover evolves at level 40 into abomasnow.
scraggy evolves at level 49
Once it reaches a certain level of happiness. There are many myths concerning happiness, but the only ways I know of to be true are: Walk 256 steps with it in your party.Gain a level.Give it a massage/spa.Give it the Soothe Bell to hold, and do the above.
riolu evolves at level 32.
Dragonair evolves into Dragonite starting at level 55.
Braixen evolves into Delphox, starting at level 36.