|This article is about a/an Giant Robo in Bakuryuu Sentai Abaranger.|
- "Bakuryuu Combine! AbarenOh!"
- ―Combination announcement[src]
AbarenOh (アバレンオー Abaren'ō, Riot Union King): When Tyranno, Kera, and Ptera combine, they form AbarenOh - a humanoid fighting machine. AbarenOh's finisher is the Bakuryuu Blitz Drill Spin (爆竜電撃ドリルスピン Bakuryū Dengeki Doriru Supin) where it launches itself forward and drills through its opponent with the drill mounted on its left arm. Other attacks are the Ptera Cutter (プテラカッター Putera Kattā), Bakuryuu Blast (爆竜ブラスト Bakuryū Burasuto), Tricera Punch (トリケラパンチ Torikera Panchi), Bakuryuu Fire (爆竜ファイヤー Bakuryū Faiyā), Tyranno Drill (ティラノドリル Tirano Doriru), and Bakuryuu Salmon Hunter (爆竜サーモンハンター Bakuryū Sāmon Hantā). On one occasion AbarenOh powered itself up using the Dino Guts of the three main Abaranger to defeat KillerGhost II. On another occasion it combined it's energies with KillerOh and MaxOhJa for an energy attack called the Special Bakuryuu Great Charge Attack to destroy Trinoid 1: Dragondoran.
Tyranno's tail can turn into the Double-Tail Sword.
Its suit actor was Hideaki_Kusaka.
AbarenOhji (アバレンオージ Abaren'ōji, Riot Union Prince) is a combination without Ptera. This was created by Ryouga in episode 14 due to Ptera and Ranru's hesitation to destroy the Giganoid. This combination would not be used afterwards.
This combination is exclusive in Episode 14.
- AbarenOh can replace Triceratops with Bakuryuu Bachycelonagurus to form AbarenOh Nagurus (アバレンオーナグルス Abaren'ō Nagurusu).
- AbarenOh can combine with Bakuryuu Dimenokodon to form AbarenOh Nokodon (アバレンオーノコドン Abaren'ō Nokodon).
- AbarenOh can combine with Bakuryuu Stegoslidon to form AbarenOh Slidon (アバレンオースライドン Abaren'ō Suraidon).
- AbarenOh can combine with Bakuryuu Parasarokkiru to form AbarenOh Rokkiru (アバレンオーロッキル Abaren'ō Rokkiru).
- AbarenOh can replace Triceratops with Bakuryuu Ankyloveilus to form AbarenOh Veilus (アバレンオーベイルス Abaren'ō Beirusu).
- AbarenOh can combine with Bakuryu Parasarokkiru and replace Triceratops with Bakuryuu Ankyloveilus to form AbarenOh Veilus Rokkiru (アバレンオーベイルスロッキル Abaren'ō Beirusu Rokkiru).
- AbarenOh can combine with Bakuryuu Firenokodon to form AbarenOh Nokodon Fire (アバレンオーノコドンファイヤー Abaren'ō Nokodon Faiyā).
- In Abaranger vs Hurricaneger, upon gaining the powers of the Hurricanegers and the Gouraigers' courage (using the kanjis for "Destroy", "Reverse", "Sword", "Roaring" and "Thunder"), AbarenOh becomes Senpuu Gourai AbarenOh (旋風轟雷アバレンオー Senpū Gōrai Abaren'ō), armed with a golden version of the Sword Slasher. Its finisher is "Bakuryuu Hissatsu Ultimate Secret Technique Copy Drill Slasher" (爆竜必殺究極奥義分身ドリルスラッシャー Bakuryū Hissatsu Kyūkyoku Ōgi Bunshin Doriru Surasshā).
When GokaiOh and Gosei Great faced the Black Cross Colossus, the mecha of the first 33 Super Sentai, including AbarenOh which possibly manifested from a toy version like DaiDenzin and the Variblune, appeared to back them up. When the Black Cross Colossus summoned several giant villains to oppose them, AbarenOh fought alongside Galaxy Mega and Daizyujin to destroy Danger Cabinet-Director Chirakasonne. After all the giant villains were destroyed, all 35 mecha weakened Black Cross Colossus with a combined attack before GokaiOh combined with the Variblune to become Goren GokaiOh which destroyed the Black Cross Colossus with the Gokai Hurricane: Cassiopeia finisher. With the battle won, the 33 past Super Sentai mecha vanished.
Through the Super Sentai Zyudenchi of the Abarangers, Gabutyra was able to summon Bakuryuu Tyrannosaurus alongside Guardian Beast Tyrannosaurus to aid him in fighting the Giant Zorima and enlarged Cambrima. When Space War God Borudosu landed on Earth, Kyoryuzin, Daizyujin and AbarenOh were formed.
- AbarenOh is the only main Sentai Robo in a dinosaur themed series not to have "Zin/Jin" in his name. This is because it is not considered to be a "God" or Divine Entity/Combination.
- AbarenOh is the last Sentai Robo with a Blue Triceratops in its combination.
- AbarenOh is the first dinosaur Sentai Robo that can be formed with only two Mechas.
- Thundersaurus Megazord - Power Rangers counterpart in Power Rangers Dino Thunder. See comparison page.