G4 Tirek

Tirek was based upon the Generation 1 character of the same name.

He is the main antagonist of Twilight's Kingdom: Part 1 and Twilight's Kingdom: Part 2, the season 4 finale of My Little Pony: Friendship is Magic.

In the distant past, Tirek and his brother Scorpan invaded Equestria and tried to steal the ponies' magic. Scorpan befriended the ponies and helped defeat Tirek, how was sent to Tartarus for his crimes.

Tirek escaped when Cerberus left his post (seen in It's About Time). He proceeded to steal pony magic and gain strength. Discord was sent to stop him, but Tirek convinced him to aid him, which he did. Celestia, Luna, and Cadance decided to transfer their magic into Twilight Sparkle, gambling that Tirek was unaware of her or her importance. When Tirek was unable to acquire the princesses power, he sent them to Tartarus. Discord, however, helped make Tirek aware of Twilight and he went after her. After capturing and depowering Applejack, Rarity, Fluttershy, Pinkie Pie, Rainbow Dash, and Spike to lure Twilight, Tirek took Discord's magic as well.

The battle between Tirek and Twilight Sparkle began with him destroying the Golden Oaks Library. The battle was intense, but quickly became a stalemate, so he offered a trade: her friends (including Discord) for the magic she currently possessed. She reluctantly agreed. After Twilight got Scorpan's medallion from Discord, which became the final key, the mane six received the power of the Tree of Harmony and defeated Tirek, sending him back to Tartarus (as well as freeing Celestia, Luna, and Cadance and restoring everyone's magic, and giving Twilight Sparkle her new castle).