"Any betta you buy from walmart
petco/smart probably will never breed. Its possible but very difficult."
Sorry,but that is not correct.
They will breed as well as a $100.00 pair from a breeder and they are not anymore difficult.
My first spawn was from a pair from Petco,after conditioning they gave a good spawn and I ended up giving away 20 and selling anouther 30.
Is it a good idea to spawn a petstore Betta,probably not,but it is not any harder.
I retired the 2 that gave me my first spawn and have since aquired better quality Bettas.