The Flame of Promise (約束の炎 Yakusoku no Hono) is 30th episode of Ultraman Mebius. It is the concluding part of a two-part arc which includes a team-up between Mirai Hibino/Ultraman Mebius and Ultraman Taro. It also features the first appearance of Ultraman Mebius' Mebius Burning Brave form.
Mirai is in a hospital room with all of his friends crowding him seeing if he would awake while they form a plan. Ryuu decides to wait until Mirai is awakened but Mirai slips out and gives Ryuu his good luck charm and leaves. Ryuu went to find Mirai by going to the place where he first met him and Mirai came. Ryuu wondered why Ultraman's would do so much to protect Earth and Mirai said it was like there past home and Mirai disappears.
GUYS are going to use the same plan from the Fantonian food and make sure Inpelaizer stays up there so the plan is activated but Inpelaizer disappears with Ultraman Taro looking up but does the Strium Beam on Inpelaizer and then Mirai was right about to change into Ultraman Mebius but Taro says that he shouldn't because he's going to use the Ultra Dynamite and end Inpelaizer but it failed.
GUYS see Mirai and go to confront him and Ryuu says that he should change into Ultraman Mebius but the others don't believe him but Teppei sees the Mebius brace and Mirai transforms and helps Ultraman Taro looking like there going to win Inpelaizer spins around and shoots but Ultraman Mebius guards his friends getting critically injured. Mebius was dying but then having the feelings from his comrades he becomes Mebius Burning Brave and uses the Mebium Burst and destroys Inpelaizer then Taro talks to Mebius saying that he should stay on Earth and protect it. Mebius becomes Mirai and they go back home happy.
- Mirai Hibino (ヒビノ・ミライ Hibino Mirai)/Ultraman Mebius (ウルトラマンメビウス Urutoraman Mebiusu Voice) - Shunji Igarashi (五十嵐 隼士 Igarashi Shunji)
- Ultraman Taro (ウルトラマンタロウ Urutoraman Tarō Voice) - Hiroya Ishimaru (石丸 博也 Ishimaru Hiroya)
- Ryu Aihara (アイハラ・リュウ Aihara Ryū) - Masaki Nishina (仁科 克基 Nishina Masaki)
- Marina Kazama (カザマ・マリナ Kazama Marina) - Ai Saikawa (斉川 あい Saikawa Ai)
- George Ikaruga (イカルガ・ジョージ Ikaruga Jōji) - Daisuke Watanabe (渡辺 大輔 Watanabe Daisuke)
- Konomi Amagai (アマガイ・コノミ Amagai Konomi) - Misato Hirata (平田 弥里 Hirata Misato)
- Teppei Kuze (クゼ・テッペイ Kuze Teppei) - Kenta Uchino (内野 謙太 Uchino Kenta)
- Shingo Sakomizu (サコミズ・シンゴ Sakomizu Shingo) - Minoru Tanaka (田中 実 Tanaka Minoru)
- Aide Toriyama (トリヤマ補佐官 Toriyama Hosakan) - Kenichi Ishii (石井 愃一 Ishii Kenichi)
- Secretary Aide Maru (マル補佐官秘書 Maru Hosakan Hisho) - Yutaka Maido (まいど 豊 Maido Yutaka)
- Yuki Misaki (ミサキ・ユキ Misaki Yuki) - Saaya Ishikawa (石川 紗彩 Ishikawa Saaya)
- Kazuya Serizawa (セリザワ・カズヤ Serizawa Kazuya) - Shin Ishikawa (石川 真 Ishikawa Shin)
- Ultraman Mebius Volume 8 features episodes 29-32.