So, first: Great work you guys did!! :)
Some things I'd add:
Sash: Landog
Grassium Z: Volcarona (Giga Drain, Solar Beam)
Normalium Z: Cloyster (Giga Impact), Volcarona (Hyper Beam)
Waterium Z: Cloyster (Hydropump)
Flynium Z: Gyarados (Bounce), Landog (Fly)
Electrium Z: Blaziken (Thunder...