I found Hula Hair Barbie and Splash 'n' Color Skipper (both 1996) at the flea market! Cleanup was tricky, Barbie's neck was damaged but I managed to fix the peg! Plus hair
Vintage Hula Hair Barbie - Etsy
Hula Hair Barbie - Etsy Finland
Hawaiian Hula Dancing Barbie Doll Souvenir Toy - Walmart.com