I found the BRR-compressed sample data in Itadaki Street 2, and ripped it to WAV format! ^.^ There are 33 samples total.
I put all the ripped sample data online at https://raspberry.rosenthalcastle.org/itadaki-street-2/is2-samples.zip .
@Raspberryfloof gosh this stuff is rad
Sample #1E is a voice saying "Bingo!" that's only played during the Bingo casino game. I never knew it was a voice clip until I slowed down its sample! ^.^