One time a bunch of particles chaos named "Chaosraider" come to earth and taken possession of monsters and use them to destroy the earth, but there is a giant named Ultraman Cosmos (Mushashi Haruno) come to save the earth. (imdb)
1 season, 65 episodes at Criticker
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Reunion With Light (2001)
- S1E1
A mysterious Light Virus wipes out a city and infects Musashi's pet monster, Lidorias. How can Musashi save it from destruction by the military forces?
Chaos Header's Shadow (2001)
- S1E2
"Shadow of the Chaos Header" Transcription: "Kaosu Heddā no Kage" (Japanese: カオスヘッダーの影)
Fly! Musashi (2001)
- S1E3
On his first solo flight in Tecch Thunder 4, Musashi acts alone, jeopardizing the team.
The Fallen Robot (2001)
- S1E4
"The Fallen Robot" Transcription: "Ochitekita Robotto" (Japanese: 落ちてきたロボット)
Musashi and Fubuki are teamed up to investigate the mysterious appearance of firefly lights in Fubuki's hometown.
Monster Fishing (2001)
- S1E6
Doigaki is put in charge of a mission to capture the monster "Mogrudon".
Present from the Sky (2001)
- S1E7
"Present from the Sky" Transcription: "Sora kara no Purezento" (Japanese: 空からのプレゼント)
Sleeping Maiden (2001)
- S1E8
Ayano becomes trapped in a dream realm. Musashi and Cosmos enter it to save her.
Friends of the Forest (2001)
- S1E9
"Friend in the Forest" Transcription: "Mori no Tomodachi" (Japanese: 森の友だち)
The Bronze Devil (2001)
- S1E10
"The Bronze Devil" Transcription: "Seidō no Majin" (Japanese: 青銅の魔神)
The Sparkle of Life (2001)
- S1E12
Team EYES fights to protect Ephemera, a mayfly-like creature that only lives for a day, every 500 years.
Daughter of Time: Part 1 (2001)
- S1E13
A girl named Reni Kurosaki is being hunted by a mysterious space lifeform. She worked as part of the construction crew of the habitation space station Germina III and supposedly died in an accident on the job.
Daughter of Time: Part 2 (2001)
- S1E14
The Defense Forces determines Reni to be a danger and hunts her. EYES is grounded after failing to capture Monster Galbas, which is being controlled by the Evil Space Organism Waroga.
Deep Sea Fight (2001)
- S1E15
Ocean Monster Jelga is driven mad by Chaos Header. It attacks Musashi and Fubuki's Sea Diver during an inspection of an undersea shield and the two are trapped.
"The Different Dimensional Trap" Transcription: "Ijigen no Wana" (Japanese: 異次元の罠)
The Legend of Mt. Nibito (2001)
- S1E18
"The Legend of Mt. Nibito" Transcription: "Nibitoyama Densetsu" (Japanese: 二人山伝説)
"The Battle With the Tech Booster: Part 1" Transcription: "Tekku Būsutā Shutsudō seyo (Zenpen)" (Japanese: テックブースター出動せよ 前編)
"The Battle With the Tech Booster: Part 2" Transcription: "Tekku Būsutā Shutsudō seyo (Kōhen)" (Japanese: テックブースター出動せよ 後編)
"The Power to Defeat the Chaos" Transcription: "Kaosu o Taosu Chikara" (Japanese: カオスを倒す力)
"A Space Monster Is Born on Earth" Transcription: "Chikyū Umare no Uchū Kaijū" (Japanese: 地球生まれの宇宙怪獣)
Strength and Power (2002)
- S1E28
"Strength and Power" Transcription: "Tsuyosa to Chikara" (Japanese: 強さと力)
The Nightmare Experiment (2002)
- S1E32
"The Nightmare Experiment" Transcription: "Akumu no Jikken" (Japanese: 悪夢の実験)
Wrath of the Sea God (2002)
- S1E34
"Wrath of the Sea God" Transcription: "Kaijin no Ikari" (Japanese: 海神の怒り)
The Mountain of Yôkai (2002)
- S1E36
"The Mountain of Yōkai" Transcription: "Yōkai no Yama" (Japanese: 妖怪の山)
Fubuki Retires?! (2002)
- S1E37
"Fubuki Retires?!" Transcription: "Fubuki Tainin?!" (Japanese: フブキ退任?!)
The Green Fugitive (2002)
- S1E41
"The Green Fugitive" Transcription: "Midori no Tōbōsha" (Japanese: 緑の逃亡者)
The Amusement Park Legend (2002)
- S1E45
"The Amusement Park Legend" Transcription: "Yūenchi Densetsu" (Japanese: 遊園地伝説)
The Miraculous Flower (2002)
- S1E46
"The Miraculous Flower" Transcription: "Kiseki no Hana" (Japanese: 奇跡の花)
Sorceress of the Sky (2002)
- S1E47
"Sorceress of the Sky" Transcription: "Sora no Majo" (Japanese: 空の魔女)
Waroga Counterattack (2002)
- S1E48
"Waroga Counterattack" Transcription: "Waroga Gyakushū" (Japanese: ワロガ逆襲)
Kaiju Smuggling!? (2002)
- S1E50
"Monster Smuggling!?" Transcription: "Kaijū Mitsuyu!?" (Japanese: 怪獣密輸!?)
"Transformation Impossible!?" Transcription: "Henshin Funō!?" (Japanese: 変身不能!?)
Human Transporter (2002)
- S1E54
"Human Transporter" Transcription: "Ningen Tensōki" (Japanese: 人間転送機)
The Sky of Revenge (2002)
- S1E58
"The Sky of Revenge" Transcription: "Fukushū no Sora" (Japanese: 復讐の空)
The Greatest Invasion (2002)
- S1E59
"Maximum Invasions" Transcription: "Saidai no Shinryaku" (Japanese: 最大の侵略)
Forbidden Weapon (2002)
- S1E61
"Forbidden Weapon" Transcription: "Kindan no Heiki" (Japanese: 禁断の兵器)
Cry of the Earth (2002)
- S1E62
"Cry of the Earth" Transcription: "Chikyū no Himei" (Japanese: 地球の悲鳴)
Chaos' Violent Attack (2002)
- S1E63
"Chaos’s Violent Attack" Transcription: "Kaosu Gekishū" (Japanese: カオス激襲)
Deathmatch on the Moon (2002)
- S1E64
"Deathmatch on the Moon" Transcription: "Getsumen no Kessen" (Japanese: 月面の決戦)