Pokemon Tower Defense is 1st generation pokemon only, so no fourth generation or second generation evolutions (including Steelix). Therefore, Onix can't evolve.
van level24
If Pokemon Tower Defense is like the real Pokemon games with the evolution system then you will not be able to evolve Graveler by leveling, you will need to trade with someone (If you are able to trade)
There is a store where you can buy moonstones, use that.
Poliwag doesn't evolve into Poliwrath. Poliwag evolves into Poliwhirl and than into Poliwarth with a Waterstone
22
yes they realy can
Gravler has to be traded to evolve.
never
100
By the way it is scizor and it doesn't evolve
16
at level 16
kakuna
yes
36
Haunter, Graveler, and Kadabra.