Polonium-210 (ポロニウム 210,   Poroniumu 210?) is a Radioisotope of the element Polonium. It first appears in the 2008 Guilala film, The Monster X Strikes Back: Attack the G8 Summit.


The Monster X Strikes Back: Attack the G8 Summit

After the president of Italy's failed attempt at killing Guilala, the president of Russia proposed a plan to kill it with a liquified version of the Radioisotope. Later, the plan was carried out by shooting a large syringe of the poison at Guilala. But, the substance only put Guilala in a temporary sleep.


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