A:AnswerSorry, you can't. It seems like BestBuy is only allowing scalpers who use bots to buy all stock. The rest of us playing fair apparently aren't allowed to Pre-Order even one.
A:AnswerIt was already up for pre order. Scalpers probably got good bit of them.
Best bet is keep checking especially close to and at release date sometimes they have more available.
A:AnswerCan’t answer this 100%, but it’s possible, but not guaranteed though.
Best bet is to check online throughout the day and go in store too, but it got bought up pretty quick by scalpers.
A:AnswerYou might be able to get lucky and find one in store on 3/26 but pre orders as of now are sold out. Usually for limited controllers they never restock again (Xenoblade, Splatoon and Smash Bros. Ultimate being good examples) unfortunately but such is the nature of Nintendo products.
A:AnswerIt will most likely be back once the scalpers had their fill, if you have access to a physical store I would recommend going there once or twice a week to see if it's available there.