ok so i know that the only way is to breed...im unsure of the process being fairly new to the world of pokemon. since beedrill learns it at lvl 25 and is a part of the bug group and thus is compatible for breeding i just need to get a beedrill and a female pinaco and breed them once i get the beedrill to lvl 25 with spikes?
Forretess learns Poison Spikes at lv.1; you must give a Heart Scale to the man in Driftvile City.
Or, there are a number of options for breeding, one I like is:
Breed a male Skorupi with Toxic Spikes with a Female Forretress to get a baby Pineco with Toxic Spikes.
! + ! = !
Female + Male = Baby Pineco with Toxic Spikes
Hope this helps! •^-^•