Is it using competitive rules? Cause if so you cant have two leftovers on your team.
edit: Your klefki would be a thousand times better if you abuse its prankster more. Give it light clay and double down on status moves. light screen, reflect, thunder wave, spikes, toxic, etc. If you are gunna use a damaging move, use Foul Play. It uses the enemys attack stat so you can bring it against their physical sweeper and chunk them with it all with your measly support pokemon.