I think is on 16 but I'm not sure.
Definitely evolve it.
You can get Chikorita in Pokemon Gold, Silver, Crystal, and Emerald.
bayleef 16 magnium 32go to smosh on YouTube its funny for realRead more: http://wiki.answers.com/What_level_does_krabby_evolve_in_pokemon_crystal#ixzz1CklsX3Jn
bayleef then meganuim.
Ash's Chikorita evolved into Bayleef in the episode titled "Current Events."
Meganium doesn't evolve. It's the third evolution of Chikorita.
Chikorita evolves into bayleef at lvl. 1. Bayleef evolves into meganium at lvl. 32.
--Chikorita evolves to Bayleef at level 16 --Bayleef evolves to Meganium at level 32
Chikorita - Bayleef lvl 16 Bayleef - Meganium lvl 32
No, Sneasel cannot evolve in Crystal.
You cannot evolve Misdreavus in Crystal.
Chikorita learns SolarBeam at level 50 in Gold, Silver, Crystal, Ruby, Sapphire, and Emerald. But Chikorita learns SolarBeam at level 45 in Diamond, Pearl, and Platinum.