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>Decidueye usually acts very cool, but it can become terribly flustered in unexpected situations like a surprise attack.
It's fast enough to completely anticipate and avoid straightforward, "honest" attacks like tackles, headbutts, scratches (normal) and punches, kicks, and honorable forms of martial arts (fighting), but if you spook it (ghost) or sneak up on it, or strike in an underhanded way (dark) then it loses its composure and freaks out.