FusionDex

For many generations, people believed Mewzma's light was able to affect the DNA of Pokémon and cause them to fuse together. However, modern science has proved that this phenomenon was false and that the resulting effects were just coincidences.

The light pouring out from all over its body affects living things and nature, impacting them in various ways. A Mewzma is said to possess the genes of all Pokémon.