EM stands for Energy Modulator. The energy from these Modulators can be combined to make Nanovor Evolve or Metamorph.Evolution and Metamorphosis are almost the same, but yet very different.
EM's are organized by the numbers and letter in their name. The first number represents the wave. Ex. 1M2 is a Wave 1 EM; 2V5 is a Wave 2 EM. The letter represents the family: Magnamod, Velocitron, and Hexite. Ex. 1H7 is a Hexite EM. Finally the last number represents the EM number in that family. The numbers 1 and 2 are common EM's, the numbers 3 and 4 are uncommon, and the numbers 5, 6, and 7 are rare EM's. At the right are some kinds of EM's with a short description.