.aw files hold the instruments and sound effects for Pikmin and Pikmin 2. You can access their contents with Yoshi2's Pikmin 2 SoundHelper.
.aw files in Pikmin 2 can be found in
/AudioRes/Banks. There you will find 49 files named
wscene_0.aw is where you will find most of the sound effects, like some Blowhog sound effects in
wScene_0_00645, but it's 8,272KB compared to 28-787KB for the rest, so I won't document too much on this one unless someone needs it.
wscene_1 317-319=(instrument), 346=(instrument), 376=(instrument), 377=(instrument), 434-436=(instrument), WIP
wscene_2 317-319=(instrument), 346=(instrument), 376=(instrument), 412-413=(instrument), WIP
(p.s. I'm mainly researching at this point and figuring out how many there are and listening for an instrument to write down, so that's why there's almost nothing,)(also feel free to make this information more efficient, because I feel like it's too big/confusing.)