I made this card five or so years ago
So if you have Sparkling Crystal on a Cinderace ex, and you are missing that Fighting Energy to be able to use its Garnet Volley attack, you can use Sparkling Crystal to bypass that attack
Halana and Alena, Partners is the perfect representation of that, and its a card that returns to Standard thanks to Foundations
Miho Asada 1 Card Miho Sugano 1 Card Mikako Nishizaki 1 Card Mika Pikazo 3 Cards Mikiko Takeda 2 Cards Mikio Menjo 2 Cards Miki Tanaka Ms
Its one of the most understated cards in the entire set, especially compared to some of the other Alternative Art Scarlet and Violet cards, but thats what makes it so desirable
Having played with the card in several different decks, I think the right shell is definitely there