That claim is incredibly unreasonable, and I am going to prove that right now:
Wobbuffet can always return an attack with double the force, no matter how powerful it was. Assuming he spends energy doing that, he would be required to possess at least as much energy as he got hit with. All that energy would have to be stored somewhere. Since Wobbuffet's body is not infinite in size, his particles would have to have an infinite amount of energy stored in them (As the power of the blast it can take is limitless). If they had an infinite charge, his body would show incredibly violent behavior, like moving at the speed of light, or having all that energy turn into mass and make the universe collapse into an infinitesmall point. That does not happen, so we can only assume wobbuffet does not need to spend energy. Therefore, the machine would actually work, and it would break the laws of physics.