Bayley is the result of Syeblay letting loose.
Bayley is crazy over hugging, to the point she will show up if anyone says the word "hug". She mainly intends to make as many friends as possible though. Bayley is mainly used for HGS highlights.
Bayley becomes Mega Bayley through the Baylite. Her hugging capabilities have strengthened after Mega Evolution. The ribbons on Mega Bayley are said to be made of a special material that allows them to move independently of one another. These ribbons allow maximum hugs. Mega Bayley's huge ponytails are the only part of herself that cannot hug.
She once fused with Decidueye, to make Baydueye.