>>46481802Technically Silvally is not a Chimera.
Mythological chimera: Creature daughter of typhoon and echidna, with the head of a lion, the body of a goat, the tail of a snake/dragon.
Biological chimera: A genetic disorder in which an individual has two different types of cells.
Silvally is actually a Simulacrum an imitation or representation of a person or thing. The best known simulacrum is the Frankenstein creature, an imitation of a man made up of different corpses.
In this case Silvally is a simulacrum of Arceus, composed of at least 9 different pokemon to replicate the entity that has all the types.
Now by possible coincidence its appearance resembles a mythological griffin.