I'm pretty sure everything with the AR is considered hacking, but hacked Pokemon wise, pokebank hasn't given any details to what they consider a hacked/illegal Pokemon, I would think it would be the following though:
- a Pokemon obtained through wild modifiers
- a Pokemon obtained through an event code ( not a legit wifi obtained event)
- a Pokemon with an illegal move, ex: Pikachu with flame thrower
- a Pokemon with maxes out evs (codes that max out a Pokemons evs)
Their is some type of Pokemon checker that some people have downloaded before that checks your and other people Pokemon to see if they are legit.
I can't remember what it was though...
I don't think a Pokemon leveled up with a ton of hacked rare candies is considered hacked, because the hack is on your bag and no the Pokemon itself/directly.
I'm not sure about exp multipliers though.
I don't think it would count because it's not really direct?