Very high HP for early game (Very highly magnified ones can be annoying)
High attack power for early game (deadlier when highly magnified)
Easily pushes through frontlines
Slow movement speed
Having Anti-Red KB units can easily push it back
An odd Red enemy that can serve as either free money or the main threat depending on the stage you find him in.
One Horn sports high damage output and a gigantic health pool, similarly to Bore. Unlike Bore, however, these attributes are balanced out with pitiful movement speed and attack range.
To defeat it early on, use meatshields with anti-Red units like Whale Cat along with Titan Cats. If you are a new player, don't let One Horn get too close to the Cat Base, since he'll easily be able to destroy it.
This enemy becomes less and less threatening as you advance in the game. You can also use him as a source of money. However, keep in mind that he can have very high strength magnifications in some stages (EX: Tiny Wings (Deadly)), allowing him to easily plow through your lines if you don't have any unit that can deal massive damage to it or slow/stop/knockback One Horn.
Loves to help people. Works part time at a fire station. However, as he is so slow on his feet, he never makes it to the fire on time.