Subtitle: Airship Super-beast (気球船超獣 Kikyū-sen Chōjū)
Another choju created by Yapool, Bad Baalon started off as a hot-air balloon which some kids took for a ride. Later that day, TAC got suspicious when a "mouth" kept popping out of the hole in the balloon. They picked up Dan Umezu, who had earlier became suspicious when he witnessed one of his playmates gone unconcious after he rode the said hot-air balloon. Aboard in the hot air balloon, Dan shot its "mouth" with a gun that Hokuto gave him and Bad Baalon took on his true form, devouring Dan and the kids aboard. It then proceed to attack TAC with his white mist, making Hokuto transform into Ultraman Ace. The two fought for a while,and though it seemed like Bad Baalon had the upper hand, Ace wasn't done yet. Ace ultimately killed him with the Palm Cutter (decapitating him) and the Star Beam Cutter (slicing him in half), releasing the kids and making many balloons.
- Height: 49 m
- Weight: 33,000 t
- Origin: Space
- Powers and Weapons
- White Mist: Bad Baalon can fire a white mist from his trunk.
- Whip Arm: Bad Baalon's right arm is a whip that can lash enemies.
- Levitation: Bad Baalon can levitate for an indeterminable amount of time.
- Hot Air-Balloon Travel: Bad Baalon can turn into a hot air-balloon for travel.
|Ultraman Ace Kaiju & Seijin|
|Verokron | Yapool | Chameleking | Vakishim | Garan | Aribunta | Giron Man | Brocken | Alien Metron Jr. | Doragory | Muruchi II | Gammas | Zaigon | Alien Antira | Unitang | Sabotendar | Baraba | Ace Killer | King Crab | Cattle God | Cowra | She-Devil | Hotarunga | Black Pigeon | Android Couple | King Kappa | Zemistlar | Aprasar | Aprasar Fairy | Space Mask | Black Satan | Giant Yapool | Mazaron Man | Yojo | Mazarius | Alien Orion | Sphinx | Alien Hipporito | Lunaticks | Undergroundmon | Gitagitanga | Red Jack | Baktari | Coakes | Bad Baalon | Kaiteigagan | Dreamgillas | Soundgillar | Machless | Snowgiran | Namahage | Alien Fire | Firemons | Alien Steal | Kaimanda | Shishigoran | Iceron | Woo II | Fubugirara | Onidevil | Gasgegon | Daidarahoshi | Hanzagiran | Verokron II | Yapool Woman | Univerlages | Aquarius | Alien Revole | Signalion | Geegon | Alien Simon | Jumbo King|