
Aero is the combination of Leo and Aries. As its name implies, it flies at high speeds, and is focused on close-quarters combat.
History
Attack: Core Drill Fist
Toys
Aero is not available as a pack of Leo and Aries, so forming it requires the purchase of Leo and Aries or Eclipse and Ghost, creating a recolored version of Biklone Aero with no sounds and eyes molded into the head.
- Metalions Auto Changer Aero/메탈리온 오토체인저 에어로 (2019)
This smaller toy combines a simplified Leo and Aries into Aero via magnet-based auto-transformation. In conjunction with Auto Changer Hurricane, it can be used to form Eclipse and Ghost.
Differences from Biklonz

As Leo and Aries appear frequently in Metalions, Aero appears rather often in the first season, likely getting more screentime than it ever did in Biklonz (with two of those appearances being a failed combination attempt in the first season and getting immediately split after catching the Ursa clone in the third season).
Unlike the other two-part Stellar Biklones, which no longer maintain their fighting styles in any particular fashion, Aero kept its ability to fly, likely thanks to its name association. However, while Biklone Aero was focused on long-range attacks, Metalions Aero mainly uses melee combat in battle.
Of note is the changing of the position of Aero's jets. In Biklonz, they were in the Aries clone's horns, but in Metalions, they are positioned in the Infinity combination port and Aries's heels.
Gallery
Trivia
- Aero has an energy shield of some sort, making it the only one of the former Stellar two-part Biklones that actually has a second ability.
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