AGE Bestiary: Chimeric Creatures (follow the link for the Green Ronin Online Store page) was designed for the Dragon Age RPG rules before the release of Fantasy AGE, but can be adapted to that later system with only a little effort.
p. 3, Manticore [stat block]: Under Favored Stunts, add "Poison Sting (4 or 2 SP)".
p. 4, Chimera [stat block]: Under Three Heads are Better than One, insert "focus" after "Breath Weapon".
p. 5, Hawkbear [stat block]: Under Favored Stunts, add "Horrifying Shriek (4 SP)" and "Quick Bite (2 SP)".
p. 6, Questing Beast [stat block]: Under Favored Stunts, add "Questing Curse (5 SP)" and Vanish (4 SP)".
p. 6, Yali [stat block]: Under Favored Stunts, add Charge (4 SP).
p. 7, Credits: Delete the second copy of the trademark sentence.
Fantasy AGE Conversions
The Fantasy AGE Basic Rulebook includes the Manticore (p. 109).
The Fantasy AGE Bestiary includes entries for Chimera (p. 24; including a table for random parts) and Griffon (p. 60).
The Basilisk entry (p. 14) mentions cockatrices, but the stat block in Chimeric Creatures has very different stats and powers. Compare the Medusa's Petrifying Gaze Stunt, on p. 110 of the Bestiary, for one possible way to modify the cockatrice's gaze for Fantasy AGE.