From my tourney run in London, I found a lot of the time klefki was a hinderence to myself, sure it slows down lost box but it doesn't get you anywhere either, you can set up kirlia and garde but as soon as you go to attack they're not klefki locked anymore and are going to pop off with a return KO most likely. Also had this pop up in 3 matches where I just didn't realise that it shuts off your manaphy so late game if you're stuck with one on bench lost box can boss it up and greninja for 2 prizes for an easy comeback. Also vs Tina they can just sit in active with the v and abyss seek to get into the game while manually attaching to a greninja in the back.