Mackenzie was an actor of a show, but his stage fright caused him and his Natu to forget and act incorrectly. However, he was given a mask, so he did not have a fright, but his Natu did not use Future Sight properly. However, Team Rocket stole Natu and some other Pokémon. Mackenzie retrieved Naughty back and battled Team Rocket. Its level increased and Natu managed to use Future Sight properly, while Mackenzie dropped the mask, since he had no more fear.
Mackenzie had a Natu named Naughty, who would've performed in his acts. It tried to use Future Sight, but failed. However, after the battle with Team Rocket, its level increased and managed to use Future Sight properly.