A platformer game for the Super Nintendo Entertainment System and Sega Genesis (later ported to the Game Boy Advance), created by Iguana Entertainment and published by Sunsoft (who adopted the character as mascot for a while). The title character is an acrobatic bat who works in a circus and has to defend it from an evil clown. The franchise spawned two games and a Spin-Off focusing on one of the antagonists, Zero the Kamikaze Squirrel.
- Brought to You by the Letter "S": Aero has an A (with little bat wings) plastered on his chest.
- Creepy Circus Music: Considering that the main character is a circus performer and the Big Bad is a Monster Clown, it should come across as no surprise that this game contains some examples of this. For example, see Circus 2 and the boss theme (the latter of which is a creepy-circus-themed remix of Flight of the Bumblebee.)
- Disproportionate Retribution: Edgar Ektor's reason for being evil in the Game Boy Advance remake of the first game: the circus kicked him out (for hurting the animals, no less!), so he kidnapped everyone in the circus years later.
- Double Jump: His second jump is a diagonal spin attack.
- Human Cannonball: The titular character on several occasions launches themselves out of a cannon to get somewhere, but it's the air-powered circus-type complete with 'FWHOOMP!' sound effect.
- I Fell for Hours: One of the bonus stages is a long dive into a pool.
- Idle Animation: In the first game, Aero bobs his head to the music or does a handstand when idle.
- Mascot with Attitude: Far less blatant than most; for one, Aero didn't get any "hip" dialogue.
- Monster Clown: Edgar Ektor, the Big Bad of the series. And just to hammer it home, the guy looks like a skull with clown makeup.
- Nintendo Hard: Very much so in the first game, but there's very little Fake Difficulty. It really makes you work for it.
- Slippy-Slidey Ice World: Boardin' Zone in the second game. He's on a snowboard for the whole thing.
- Spikes of Doom: Spikes instantly kill Aero, while enemies hits remove one of his health icons.
- Spin-Off: Zero the Kamikaze Squirrel, an enemy from the first game, got his own game.
- Temporary Platform: In the first level, you need to find seven star platforms. You need to jump on them and make them disappear before you finish the level.
- Timed Mission: There's a countdown clock, but no penalty beyond missing a time bonus.
- Video Game Flight: When you collect a certain powerup, you get to hover in place or fly in any direction for a few seconds. Without it, there's only the diagonal spin for an attack.
Tropes present in the Zero the Kamikaze Squirrel spin-off:
- Boss Rush: The end of Act 2 through Act 3 of the paper factory.
- Chekhov's Gunman: You need help from Zero's girlfriend to land the final blow on Ektor at the end.
- Conveyor Belt-O-Doom: The paper factory is chock full of these.
- Disc-One Final Boss: The Big Bad of the game is an evil lumberjack, but after beating him, you have to fight Edgar Ektor, who is the Big Bad of the whole series.
- Excuse Plot: You must stop the aformentioned evil lumberjack from destroying Zero's forest to print counterfeit money.
- Family-Unfriendly Death: If you fall into the wrong machine in the mountain tunnels or paper factory levels, you'll hear a loud rumbling noise followed by Zero's bones being spit out.