>>38704466I don't think it'd become an instant staple. I don't think Onix offer's anything else outside of this hypothetical rock typed flinch move. It's basically a fake out that is stronger but can only be used once. Fake Out is great since you can use it multiple times. I just don't think it'd be worth running considering just how terrible Onix really is. It has Wide Guard but that's just about the only notable move it has. Most I could see is Rock Slide, Taunt, Wide Guard, Toxic/Protect. With no form of reliable recovery outside of Rest (and maybe sleep talk) I can't see it getting
>252+ SpA Kyogre-Primal Origin Pulse vs. +3 252 HP / 252+ SpD Onix in Heavy Rain: 700-828 (255.4 - 302.1%) -- guaranteed OHKO>252+ Atk Groudon-Primal Precipice Blades vs. +3 252 HP / 0 Def Onix: 150-176 (54.7 - 64.2%) -- guaranteed 2HKOGroudon still 2HKO's the thing even after +3 boost to it's stats (I'm assuming that whenever the anon mentioned onmiboost he meant all stats)
I really don't think it'd become a staple and more of a gimmick. Onix is just terrible and can't be fixed, there is a reason why they gave it an evolution after all.