Midnight Castle is the home of Tirek in the special Rescue at Midnight Castle, from which he sent forth his Stratadons under the leadership of Scorpan. On his orders, Tirek's minions brought several ponies to the castle so that they could be transformed into monstrous creatures using the Rainbow of Darkness. Tirek hoped to use four of these beasts to pull his Chariot of Midnight and unleash eternal night. However, thanks to the arrival of Megan Williams and her friends and the rebellion of Scorpan, Tirek's plan was halted and Midnight Castle destroyed.