Spikezilla

Spikezilla was a of prophecy. According to Granny Smith-obaasama, he was to destroy Ponyville-cho unless a girl from Ponyville-cho High School stopped him. When he did attack, Applejack-san tried to stop him herself, but failed miserbly. She eventually managed to convince Twilight-san that her destiny was to defeat the dragon, but Twilight-san herself failed, even after becoming Magical Pony. Eventually with the help of the others, they stood a chance, but got rid of the manga world before they could win.

He was originally but was transformed into a monster by. Later events seem to indicate that he either became a being in his own right following Discord's hijinks, or else had been one previously and was co-opted by Discord for his own amusement.

Appearances

 * A Day in the Life of Equestria volume 1 chapter 8
 * A Day in the Life of Equestria volume 3 chapter 6