|This article is about a/an episode in Kamen Rider OOO.|
Friendship, Chaos, and the Belt Left Behind (友情と暴走と残されたベルト Yūjō to Bōsō to Nokosareta Beruto) is the thirty-third episode of Kamen Rider OOO.
Eiji is summoned to a park owned by a former school friend who wants to be a greater help to his dreams.
Using his Pteranodon Yummy to see if he is more worthy of housing the purple Core Medals than he is, Maki witnesses Eiji become Kamen Rider OOO Putotyra Combo against his will again with Ankh unable to hold the Core Medals. Later, as an argument over Eiji's inability to control the purple Core Medals, Chiyoko arrives with a letter with theme park tickets for Eiji from a young man named Yuichi Kitamura who clams to be Eiji's old friend from high school. The gang arrive to the theme park where Eiji meets Kitamura and finally remembers. Everyone but Ankh has fun until Hina disappears and everyone splits up to find her. As Kitamura arrives to help Eiji find Hina, a Yummy attacks Akira who dons the Birth armor to overpower the monster until it molts into the Fukurō Yummy and flies off with Akira as Shintaro arrives to find the Birth Driver. Eiji arrives soon after and learns of Akira's abduction, yet feels they need to find Hina first as Ankh decides to handle it himself. However, Ankh finds Kitamura and realizes he is the Yummy's source before falls for the man's trap. Kitamura then lead Eiji and Shintaro to Hina before the two are attacked by the Fukurō Yummy. Though Eiji using the purple Core Medals is out of the question, Shintaro felt not ready to become Kamen Rider Birth and is captured soon after. However, as the purple Core Medals attempt to take control, Ankh arrives in time and has Eiji become Kamen Rider OOO Sagohzo Combo instead to overpower the Fukurō Yummy until he uses Shintaro as a shield to escape. As Kitamura and Hina help Eiji find the others, with him keeping quiet of the former's action against him, Ankh is unaware that he is targeted by his other self and Kazari as the Fukurō Yummy's next victim.
- Medals Used:
- Head - Taka, Ptera, Sai
- Arms - Tora, Tricera, Gorilla
- Legs - Batta, Tyranno, Zou
- Combos Used:
- Tatoba Combo, Putotyra Combo, Sagohzo Combo
- Eiji Hino (火野 映司 Hino Eiji): Shu Watanabe (渡部 秀 Watanabe Shū)
- Ankh/Shingo Izumi (アンク／泉 信吾 Anku/Izumi Shingo): Ryosuke Miura (三浦 涼介 Miura Ryōsuke)
- Hina Izumi (泉 比奈 Izumi Hina): Riho Takada (高田 里穂 Takada Riho)
- Shintaro Goto (後藤 慎太郎 Gotō Shintarō): Asaya Kimijima (君嶋 麻耶 Kimijima Asaya)
- Chiyoko Shiraishi (白石 千世子 Shiraishi Chiyoko): Marie Kai (甲斐 まり恵 Kai Marie)
- Kiyoto Maki (真木 清人 Maki Kiyoto): Yu Kamio (神尾 佑 Kamio Yū)
- Akira Date (伊達 明 Date Akira): Hiroaki Iwanaga (岩永 洋昭 Iwanaga Hiroaki)
- Kazari (カザリ): Taito Hashimoto (橋本 汰斗 Hashimoto Taito)
- Ankh (Lost) (Human State) (アンク（ロスト）（人間形態） Anku (Rosuto) (Ningen Keitai)): Hikari Tobita (飛田 光里 Tobita Hikari)
- Yuichi Kitamura (北村 雄一 Kitamura Yūichi): Takuya Nakayama (中山 卓也 Nakayama Takuya)
- Pteranodon Yummy (プテラノドンヤミー Puteranodon Yamī, Voice): Nobutoshi Canna (神奈 延年 Kanna Nobutoshi)
- As part of Super Hero Time, this episode aired alongside Kaizoku Sentai Gokaiger episode 12, Ep. 12: The Guaranteed Showy Samurai.
- OOO's Core Medal Collection
- First appearance of Sagohzo Combo since episode 15.
Kamen Rider OOO Volume 9 features episodes 33-36: Friendship, Chaos, and the Belt Left Behind, The Best Friend, Uses, and Their Relationship, Dreams, the Big Brother, and Birth's Secret and Broken Dreams, the Body, and the Greeed Resurrection.