NEDM Bomb

The NEDM Bomb is a very deadly weapon, created by capturing the raw energy from Happycat's NEDM attack - or replicating it - and storing it in a nuclear missile. Only 4 countries have NEDM Bombs: the Weegee Empire (the first to develop them), the Bowser Empire (which stole the plans from Weegee and traveled back in time so that they would technically be the first), the Ducky Empire (which modified its Snowtomic Bombs to store solid Enedium) and Pumkin World (which stole some from the Bowser Empire). However, they have not (yet) been used in combat, which is good, because a single NEDM-blast could kill many of the Undefeatables or level a metropolitan area the size of Tokyo city.
In the distant future, the immortal Billy Mays will start selling "affordable NEDM Bombs for everyone", starting Kittehlandia World War C, a war that will collapse Kittehlandia into the NEDM Black Hole.