I still can't find these hidden hollows other than the one Bianca shown me and within Losthorn Forest. Heard they're one within Route 7 but I haven't seen it. BTW how many of you plan on breeding a couple of Pokemon from BW1 and transferring them to BW2 as soon as able to trade? I'm thinking of in-game story with a Houndoom myself.
More Pokewood weirdness
Type: Electric/Flying (U1) / Psychic/Electric (U2)
Type: Steel (M1) / Steel/Electric (M2)
Ability: Analytic (M1) / Flash Fire (M2)