I'll take you on, Ayeun. Can we ban Attract, Captivate, Endeavour, Destiny Bond, Grudge, Memento, and the rest of the non-damaging moves that either heal or cause a status condition (e.g. Recover and Thunder Wave, but not Giga Drain or Thunderpunch)?
Go, Blademaster (the Gallade, not the TPMer)!
Okay Blademaster, first battle, so let's give it our all.
Use a Taunt and Safeguard combo to start, then lash out on La Bella with a good Leaf Blade.
If she tries Double Team or any stat boosting moves, Snatch the benefit(s) for yourself if you can, but save it for your third action, just incase.
Edit: Before I forget, what's the scoop on abilities? In the event they're on, my Gallade has Steadfast.