Forum:Notes 42 (All, Easter Eggs) - KeybladeSpyMaster

Recurring

 * The number 13 (see Kingdom Hearts (series)
 * KHII: Roxas's shorts have the roman numeral XIII (13) on the skull.

Kingdom Hearts Birth by Sleep

 * HD2.5: A book in Ventus's room is labeled "Ultimania", a reference to the Kingdom Hearts series' various Japanese guide books.