Its body is mostly dark purple in color, with its ears and feet ending with a brighter purple. Its face is marked by a yellow jaw and red cheeks. Its gun arms are bright shades of blue with purple and yellow highlights, and they are wrapped in magenta chains. On Riku's Side, it has wings that resemble the beautiful stained-glass windows of Notre Dame. The Nightmare Dream Eater sigil is on the front of colorful, belt-like bands around its waist.
 Kingdom Hearts 3D: Dream Drop Distance
Riku is ambushed by the Wargoyle while searching for Claude Frollo in the Outskirts of La Cité des Cloches. The beast chases Riku to the Mill, where Riku finally finds Frollo, attempting to punish the inhabitants for harboring gypsies, and Phoebus, who tries to stop him. When the Wargoyle appears, Riku realizes that it was created from Frollo's darkness, but the insane judge claims that he was granted the beast as an agent of "righteous judgment" to destroy the gypsies forever. When Phoebus attempts to stop Frollo from leaving, the Wargoyle easily overpowers him and leaves the soldier badly injured. After Riku tracks Frollo to the top of Notre Dame, the judge summons the Wargoyle to eliminate him, but Riku defeats it after a grueling battle. The Wargoyle's wings shatter, and it falls into the fires below.
In Sora's version of the world, Sora attempts to follow Frollo when the judge pursues Quasimodo and Esmeralda into Notre Dame, but he is stopped by the now-wingless Wargoyle, who dives from the sky and demolishes the bonfire. Sora manages to defeat the rampaging Nightmare, then proceeds into the Notre Dame.
Later, as the Spellican fights Sora during his second visit to Traverse Town, it summons the Wargoyle to replace the Hockomonkey. The Wargoyle is in turn replaced by the Char Clawbster upon its demise.
The Wargoyle can be a challenge due to its airborne mobility. Although the boss remains in the air for the duration of the battle, Riku can circumvent this by leaping off the cathedral, thus allowing him to ride the updrafts created by the flames below. Wargoyle utilizes many fire-based attacks such as fire balls, fire enhanced physical attacks, and even an attack where it cloaks itself in darkness and charges at Riku in midair. If the attack connects, Wargoyle will grab Riku with its tail and throw him back onto the cathedral.
When its HP is reduced to a certain point, Wargoyle will use a new attack where it unleashes a barrage of fireballs from its arm-mounted gatling guns. This attack can be avoided by taking cover behind one of the two columns on the cathedral. Ice based attacks are effective at damaging Wargoyle. As long as Riku dodges Wargoyle's attacks and uses Reality Shifts when prompted, Wargoyle will fall with relative ease.
The Wargoyle mainly attacks by punching Sora with its guns. Its other attack involves spinning around, attempting to hit Sora multiple times. Both of these attacks will occasionally cause Wargoyle to lose its balance and fall over, vulnerable to attacks. Beware though, as Wargoyle will recover with a fire pillar surrounding it, dealing damage if Sora is too close.
Wargoyle also attacks by swinging its twins guns together, and rains fireballs down from the sky. As the Nightmare's health dwindles, its attacks become more ferocious. Its pyro punch attack creates small pillars of flame in its general direction, and it will combine its pyro punch with its fire storm, making it hard to avoid. Like with Riku, Ice based commands are most effective at dealing damage. So long as Sora dodges the boss's attacks, heals frequently, and uses Reality Shifts when prompted, Wargoyle will be defeated.