>>58866464Mixed superficial appeal (based on a beautiful iconic actress but that doesn't necessarily translate to what fans of animu games find appealing), has a bog standard "champion" personality that is hampered by the fact she also has zero presence in the game, unmemorable champion battle.
But to be fair, XY characters in general weren't very popular. The most popular were the female protagonist, which is given, and Hex Trainer. The friends, the gym leaders (excluding Korrina maybe, a glorified Mega shill), the villains, the elite four members, no one else really blew up.