>>53124371I like to tie both the fossil resurrection process and the other two genetically spliced pokemon back to Fuji's mew fiasco. It was partly inspired by Jurassic Park on how they have to use DNA of extant animals to patch up the gaps of the one they extracted from prehistoric mosquitos; Cara Liss might as well used Mew's cells to create her abominations that she claimed to exist in ancient times.
Mew is basically a living stem cell of the universe, and it's no wonder why it remain hidden for so long. Hell, some might believe it's the first life created after the creation of the material world along with the concept of emotions and spirits, making it billions of years old.