Spee is found in the Sun Dappled Path area in the Salikawood. There is a 15% chance it will spawn when a Wyrdhare is defeated, but only shows up when the party gets close. There are three possible spawn sites, all dead ends. If it will not appear after all Wyrdhares have been defeated, the party must move two zones away and try again.
It also appears in the Zodiac versions' Trial Mode in Stage 69 upon approaching the other end of the stage where it yields some special spoils: Cat-ear Hood (rare drop and poach), and Elixir (very rare drop).