To add onto that, volbeatdown and I have been messing around subtox and subwow gallade as a way to beat it's traditional counters and checks (more for the latter). Its a good way to help pokemon with similar checks and counters as metallized.
Also there is also many more options like Skill Swap(Unnaware users and what not), Taunt(its taunt) and etc its not like it misses too much lackign a set up move because you know 120 BP move coming from a 165 Base Atack is not somethign you simply say its weak lol
PS:Skill Swap Gallade in really low ladder makes up for some hylarious shit like skill swaping Moxie,Shed Skin,Skill Link,Contrary and etc from the low ladder heroes lol