Of course you could order them online...
Never saw it either in Target or Walmart.
Both places have the Deoxyys box, and a bunch of Black/White Kyurem boxes.
Plus older boxes including that "____ Oshawatt" set, the older Kyurem set, some Reshiram/Zekrom sets, and of course Legends of Justice.
Not to mention a bunch of older tins as well (including the Snivy/Tepig/Oshawatt ones).