I actually mostly use PO, I don't even really like Showdown, I just use it in BABA stuff because that's what everybody else uses.
Anyway, as much as I would love to do Wi-Fi, I don't have good (competitive) Pokemon (as in, IDK the IVs and EVs aren't as particular as they should be). Also, I can't even use Nintendo Wi-Fi connection, so it's not an option xD