|This article is about a/an episode in Battle Fever J.|
Decisive Battle!! All Monsters Appear (決戦!! 怪人総登場 Kessen!! Kaijin Sō Tōjō) is the twenty-third episode of Battle Fever J. It is a clipshow episode.
After a humiliating defeat against an Egos Monster, Tetsuzan reminds Battle Fever of their past accomplishments to push them forwards.
While they’re busy playing video games (Space Invaders), Egos issues a challenge to the defense department. Their new kaijin has the ability to make shadow decoys, and with their hearts not really in the fight, Battle Fever is beaten badly. Furious with them for their lack of seriousness, Tetsuzan Shogun reviews their past victories with them. He reviews the launch of the Battle Fever Robo (Ep. 5 & 6), Masao’s investigation of the Prodigy Sports Club (Ep. 8), Kensaku and the golden crowned chicken (Ep. 13), Kyosuke’s exposure of the tainted escargot (Ep. 15), Shiro’s fight with the Nauman Elephant (Ep. 10), and Diane’s vow to avenge her father (Ep. 1). With their fighting spirit and bushido code restored, they are ready to continue the fight against Egos.
- Masao Den (伝正夫 Den Masao): Kouki Tanioka (谷岡弘規 Tanioka Kōki)
- Kensaku Shiraishi (白石 謙作 Shiraishi Kensaku): Yukio Itou (伊藤幸雄 Itō Yukio)
- Kyousuke Shida (志田 京介 Shida Kyōsuke): Yuuhei Kurachi (倉知 雄平 Kurachi Yūhei)
- Shirou Akebono (曙四郎 Akebono Shirō): Kenji Ohba (大葉 健二 Ōba Kenji)
- Diane Martin (ダイアン・マーチン Daian Māchin): Diane Martin
- Diane Martin (Voice): Lisa Komaki (小牧 リサ Komaki Risa)
- General Tetsuzan Kurama (倉間鉄山 Kurama Tetsuzan): Chiyonosuke Azuma (東千代之介 Azuma Chiyonosuke)
- Keiko Nakahara (中原ケイコ Nakahara Keiko): Noriko Hidaka (日高 のり子 Hidaka Noriko)
- Tomoko Ueno (上野トモコ Ueno Tomoko): Keiko Kanno (菅野啓子 Kanno Keiko)
- Commander Hedder (ヘッダー指揮官 Heddā Shikikan): Masashi Ishibashi (石橋雅史 Ishibashi Masashi)
- Salomé (サロメ Sarome): Maki Ueda (マキ上田)
- Satan Egos (サタンエゴス Satan Egosu, Voice): Shōzō Iizuka (飯塚 昭三 Iizuka Shōzō)
- Battle Japan: Kazuo Niibori
- Battle Cossack: Hirofumi Koga
- Battle France: Haruhiko Hashimoto
- Battle Kenya: Tsutomu Kitagawa
- Miss America: Eiko Onodera
Battle Fever J Volume 3 features episodes 23-33. 
- In the opening scene of this episode, a variation of Battle Fever Daishutsugeki can be heard singing not about Battle Fever but in regards to the Space Invaders video game, which were so popular in Japan during this period that there were many arcades that were devoted to Space Invaders and games similar to it.