|This article is about a/an spin-off episode in Tensou Sentai Goseiger.|
Super Sentai Versus Series Theater: Battle 21 (スーパー戦隊VSシリーズ劇場 BATTLE-21 Sūpā Sentai Bāsasu Shirīzu Gekijō BATTLE-21) is the twenty-first installment of the Super Sentai Versus Series Theater. Showcasing part 2 of the 2004 film Bakuryuu Sentai Abaranger vs. Hurricaneger, its broadcast accompanied Tensou Sentai Goseiger Epic 36: Run, Agri!.
Welcoming the audience to the Super Sentai Versus Series Theater's twenty-first episode, Bakuryuu Sentai Abaranger vs. Hurricaneger - Part 2, the Goseigers recount what happened last time; the Hurricanegers' Shinobi Machines, Senpuujin and Gouraijin, suddenly started attacking the city. Wendinu and Furabiijo were behind it while standing in the Abarangers' way is the Evil Ninja Iga. The Hurricanegers also appeared, so Iga used a duplication technique. In that time, he stole people's Dino Guts so he could power up. Agri cannot help but cosplay, and is dressed as AbareBlack ahead of the others as the team leaves it to Datas who screens the conclusion.
The teamup concludes with the Goseigers in awe at the Hurricanegers' using Dino Guts to form Senpuu Gourai AbarenOh. The team are now all dressed as the Abarangers to the dismay of Eri who is wearing the coat of Mikoto Nakadai, leader of the Evolians. After they perform the Abaranger basic roll call, Hyde announces that next up is the Space Police Tokusou Sentai Dekaranger. Agri is already enthusiastic to wear a police uniform while Moune changes the subject to today's Goseiger. Alata reveals that the heartless Matrintis Empire will be kidnapping top athletes so they can remodel them into their cyborg vanguard. Eri reconsiders wearing AbareKiller's coat when Hyde notes she looks intimidating as she vows to beat Matrintis. Eri and Alata remind the viewers to stay on their channel to see Goseiger at 7:30 and to watch the continuing Super Sentai Versus Series Theater next week.