>>58643541Only if Ash was in the show and met her.
https://www.youtube.com/watch?v=bHVuUhqlMVwIn fact Horizons could have worked if Ash was a referring character that RVT and the Explorers encounters in their journey. Maybe Ash and Sango develop a fun friendship before he learns about her being part of an evil organization and infecting her own pokemon with harmful substance for power. Maybe this starts Sango to question her own motivation with the Explorers.