What is a good level to evolve my Pansear it's at 19 right now and I"m considering evolving it
I recommend Level 22 although you can wait til Level 43 for Crunch. Just keep in mind it will be a bit weak in the later levels.
Best you get to Level 22, cos it learns Flame Burst at that level. Learn Flame Burst, then evolve it and just give it TMs.