OOC: I'll say that you can. I think that BrOken does.
Gengar takes 15% damage (85%)!
Gallade takes 0% damage (65%)!
Stingy? Nah. The level jump and effectiveness have determined this, and it's my final calculation.
@mlouden Your move this turn was retreating Tyranitar. You can Shadow Ball next turn.
"Com'on out everyone!" said Rileigh throwing the Pokeballs into the air. "Your all evolving!" And just like that Snivy evolved into a Servine. "Servine!" Caterpie into a Metapod then a Butterfree. "Butterfree!" And Numel into Camerupt. "Camerupt!" "You guys grow up so fast!"
OOC:
I know about the weakness. The level difference stops it from being good.
Gengar's Levitate renders Earthquake useless!
Gengar takes no damage (85%)!
Gallade takes 30& damage (35%)!