As far as the Crossroads Themed Pokémon idea goes, we could use Eevee or Tyogue since they have multiple evolutions. We could also use Wurmple, since it's Evolution line splits or Poliwhirl for the same reason because it can evolve into Poliwrath or Politoed. Same with Gloom who can evolve into Vileplume or Bellossom and Kirlia who can evolve into Gardevoir or Gallade. Snorunt as well, since it evolves into Glalie or Froslass and Clampearl because it evolves into Gorebyss or Huntail. We can also use Unown because it has 28 different Formes and Deoxys because of it's multiple Formes. We can have a triple mascot of Pansage, Pansear, and Panpour since they're similar but different Types. Like you have to choose between them. Vivillion's pattern is determined on it's location, so it has many patterns. Arceus can change to any type too. Zorua and Zoroark can create the illusion of being anything as well. However, I think DITTO is the ideal mascot since it isn't exactly popular and it can change into ANY Pokémon.