This weapon idea popped in my head in a split second like all do: Call it "Invisible Portal Mat or the IPM." The idea of this mat is that it does no damage. The benefit of it is if your opponent land on it they automatically teleport to another random spot. You can use it as your first move, to set up future moves. Here is an example: You have an opponent that has a falcon, and you have, you place it at a range 8 spot. There is a 1/4 chance that they will land on it, to use the falcon. They don't know the spot you used it on, yet they know you used it. So, they take a risk and land on it to use the falcon, and teleport to another spot that they can't use the falcon. Now you can also land on it and be teleported on it. So, after you used it 5 moves your opponent uses a knock back weapon that lands you on it, and you get teleport.
Now the AIPM: The Advanced one. It basically gives the advance to pick 2 spots of one they teleport and where they will go to. No damage. You choose 2 spots in one turn. It either affects you or him. So, which ever spot they land on they will be teleported.
This might be dumb, or not. I'm just throwing it out there.