>>16876620But think of the possibilities. The most common switch-ins are pokemon immune to paralysis and many of them like Hippowdown and Rotom-W absolutely hate being crippled by Iron Ball.
If Klefki gets Lefties from them then it's all good, but if it gets something like a Choice Scarf it can be used to cripple something else later int he match.
If you're worried about being locked into 1 move by a choice item then just give it Spikes so it can still be useful.
It's just another usable option for a pokemon that was already versatile and annoying.