When the island first appeared on the radar of Equestria, Princess Celestia forbid travel to the island until she commissioned an expedition team herself. Shining Armor, who only meant to take a faster route home from a diplomatic mission by flying over the island, goes missing. Upon hearing this from Celestia Twilight enlists the help of her many friends to travel to the island to rescue him, along with those who accompanied the prince. Celestia herself gathers a small army as precaution, though her advisors persistently say that the island should be uninhabited.

The hulking figure that greets them when they enter says otherwise.

(Kong: Skull Island crossover)