BW has had 3 fillers so far. Claiming BW21 is important is ridiculous, you could skip the ep entirely and you wouldn't miss anything important. Ash rotated Pokemon off-screen before as well.
I think people are just trying to pass everything off as non-filler because they're worried that BW is going to turn into the Johto saga due to Iris not having an active goal.
I think people are just trying to pass everything off as non-filler because they're worried that BW is going to turn into the Johto saga due to Iris not having an active goal.