On the episode with the demi-meramon, there's a part where it first appears, and a guy with blond hairhops out of a car, some guys say "I wonder what that was" and he replies "you wont need to worry about that" and he pulls out what looks like a pen, then flashes a light at them. They then fall to the ground, and he says "memory erased." This is a Men in Black reference where they use a light flash to erase memories.