From FlyFF WIki
Introduced in the version 15 update the Buff Pets System is a long awaited addition to the game. Now your favorite Pick-up Pet can buff you while you fight. The user can chose from the new pick up buff pets or simply buy the scrolls and awaken your own pick up pet. These awakenings can be applied to any pick-up pet.
|First summon your pick-up pet.
Then activate the Pick-up Pet Upgrade scroll.
|You pet now has 2 open slots in which you may insert Buff Beads|
|Your Buff Pet may hold up to 9 beads for you at a time. To unlock the other slots use the Bead Slot Key.|
|Double click, and select yes. Your pet now has one more slot.|