Rainbowdashtheawesome
20% Cooler
Its called:
A) B button
B) Soft reset
There's no reason to devolve in Pokemon. If you evolve something you didn't want to you're supposed to live with the consequences. Like... LIFE. o_o
Here's a (hypothetical) scenario:
I want the pokedex data for all 3 Tyrogue evos, but only have one Tyrogue and no Dittos to breed with it when it evolves (either that or I just haven't got enough patience to breed it). I evolve it into Hitmonchan, but now I still need the data for Hitmonlee and Hitmontop. As I said, I can't get a new Tyrogue and nobody will trade me it or one of its other evos; what am I to do?
I know! I'll just devolve Hitmonchan, reevolve it into a different form, devolve it again, and reevolve it into the last one I need data for. Wow, now I can get data for every pokemon related to Tyrogue and I don't even need to trade, clone, or breed!