The first part of this Pokémon's name is a reference to the word Terra, meaning Earth, referencing the fact that it is a Rock-type Pokémon, as well as the Pokémon's color; Terracotta, a shade of brown.
It is not as hard to catch as the other members of its trio.
It can only be reached by entering the end of Victory Road by moving the boulder. After moving the boulder, you can reach its trial from the North or South.
Terrakion is the only legendary musketeer to have a unique type combination: Cobalion has the same combination as Lucario, Virizion has the same combination as Breloom, and Keldeo has the same combination as Poliwrath.
Terrakion is one of the two legendary Pokémon that is found in Victory Road, the other Pokémon being Moltres.