It doesn't evolve at level, it needs happiness to evolve into Clefairy and needs a moon stone to go into Clefable, maybe just try and use the moon stone?
around level 30
cleffairy and jigglypuff
The moonstone is used to evolve certain types of Pokemon. Some Pokemon that evolve using the moonstone include: Nidorina, Nidorino, Jigglypuff and Cleffairy.
Cleffairy Skitty Jigglypuff Nidorina Nidorino and in Pokemon black and white also i think munna evolves into musharna with a moon stone :P
It is suppose to evolve at the Level of 20,but if you want it to evolve later it can evolve anything after it is at Level 20.
It will evolve by level. Teddiursa will evolve into a Ursaring at level 30.
They evolve at level 36
It will evolve at level 36.
They evolve on level 40
it evolve on level on 64
To evolve a Sandshrew level it up to Level 22 and it will evolve into Sandslash.
Pikachu do not evolve by level. They evolve when a thunderstone is used on them.