Y/n was a dark type gym leader and she had a ceruledge, minikyu, Greninja, umbreon, Absol and Lucario. Y/n also has a of the eevee evolutions. One day ash, Serena, Bonnie, and Clement. Came into her gym to battle her and after that battle, she joined their journey.  and Lilly had mega evolution stones for Greninja and Ceruledge. the other gym leaders told Ash before he even met her or new her that she was really strong. The others gym leaders had respect for y/n