No other Pokémon has the same type combination as Terrakion.
Terrakion is the only legendary musketeer to have a unique type combination; Cobalion has the same type combination as Lucario, Virizion has the same type combination as Breloom, and Keldeo has the same type combination as Poliwrath.
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.
Terrakion is the only Fighting-type Pokémon to be weak to Steel-type attacks.
Terrakion is one of the two legendary pokemon that is found in victory road, the other Pokemon being Moltres.