remember to always check the B2W2 General ROM Info thread; it's been known for a while
ctrl-f: fly, you get:
/a/1/1/6 ********* large key item textures (magma stone, mirror, lunar wing), also mugshot backgrounds (fiery/icy winds etc), keldeo form change(281), NPC fly action animations(59,67)
poke around a bit and you see that file 58 & 66 have the flying animation (show textures after pressing view)
alder's is @ 134 and the heroine is @ 138 & 142
these are all just animations of sprites, so there's loads of other animation related stuff in this narc (like prebattle fade animations)
as for the PWT opponent screens... I have no idea.