The Freakish Bestiary lexicon is rectangular with curved corners on the ends of the covers, as well as a concave edge on each cover. Both the top and bottom edges of the spine are also concave. The both covers share a pale yellow, three-pronged symbol superimposed over a grey ring.
The three-pronged symbol is vaguely reminiscent of the three interconnected Nobody symbol design on the front cover of the Book of Retribution. The corners of the spine each sport a slightly curved, pale yellow rectangle, each with a grey border. The lexicon itself is mostly black and also has a grey border. The Arcane Compendium is nearly identical to this lexicon, save for its color scheme.
Something that is "freakish" is bizarre or unpredictable. A bestiary is a compendium of information on various animals, both real and fictional. "Ghostly" can mean "frightening", and a picture book is a book, often intended for young children, with text accompanied by illustrations.
The Freakish Bestiary's ground combo begins with a vertical downward slash, a leftward/rightward swipe, and a spinning horizontal slash as a combo finisher. If is pushed, the leftward/rightward swipe launches Zexion into the air where he finishes the combo with the final forward spinning throw.
Freakish Bestiary's aerial combo is simple, consisting only of a downward vertical slash, an upward vertical slash, and a final forward spinning throw.
When the Freakish Bestiary contacts an enemy, a green star burst and smaller yellow semicircles expand outward.
| Aggression | Ignition | Vortex | Inquisition | Harbinger | Freakish Bestiary | Berserk | Inferno | Songbird | Death | Quiet Belladonna | Indigo | Midnight Roar|
Soul Eater | Mage's Staff | Knight's Shield | Kingdom Key D | Kingdom Key