Heart Tailed Eevee

[Mario60866iPod13]

This Eevee has a heart on its tail and it's so cute!!! But why does it have one? Around one in eight Eevees I find have this. It didn't happen in Ultra Sun and Ultra Moon so why now?

 

[DHR-107]

Its a girl.

Male and Female Eevee have tail differences.

Also please use the SQSA thread for these sorts of questions, or even the Pokemon GO thread.