Kinkofbubu

Hey. Thanks for the guide. i have few questions. Is there a reason you mention that Headbutt and Thief should be preferably on Nidoran M? I already gave him Thief but now I dont know, if it wount damage his lvling ability. Also if I got Nidoran M with Hustle but Lax nature. Will it be still viable? The IVs also go more in deff. Only 12 ATK and 16 SPATK. Should I care about Natures during early leveling and story? I already spent hours and more then 10k on pokeballs, just to get the natures you said we should get. Thx