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you have to beat the first challenge on challenge mode or you have a 1.8 percent of getting it in the wild
level 16
32
level 36
It evolves at level 36.
22
lvl 21
50
Nidoran evolves on level 65.
Charmeleon evolves at level 36.
you either catch one by getting its health bar red or by getting a shiny geodude by beating the first challenge level
Geodude evolves at level 25 into Graveler in the battle arena.