>>16684903... Why would mega gengar even be banned at all? He's annoying, but he's really not a huge deal. Losing an item slot really hurts megas.
Anyways, what mega gengar can't do is literally everything else klefki can. You only use fairly lock as a surprise kill move, and in the meantime you still have a prankster with the mother of all support movepools. Crafty shield actually has some use in doubles to keep taunt and t-wave off your other poke.
>>16684954>situational>useful in any given situationFor a certain definition of situational, yes. If you have a check or counter for any pokemon your opponent is using, fairly lock puts them in so much danger that they can't risk coming out while klefki is on the field.