Dr. Zager is a Team Rocket scientist.
Dr. Zager is shown to view his work as a scientist seriously. However, at times of great discovery, he can become excited, as seen when he first analyzed the Meteonite and when his resurrection of Tirtouga led to the complete opening of the Time Gate. He is also practical-minded, ordering retreats when missions are failing without trying unreasonably to salvage them.
Chronicles of Great Empire
Dr. Zager appeared as a member of the Cemetery Wind.
Zager appeared as one of the members of the Knights of Gjallarhorn (Crossover War Heroes: Iron-Blooded Kid Warriors) led by Gunther Prozen. He was the one, who mentored Rustal Elion and the rest of his friends in order to capture Leo Conrad and Sally Land alive. However, Dr. Zager met his demise against the hands of Lucifer Langdon just before the deaths of Kudelia Aina Bernstein and her companions.
Allies and Enemies
Allies: Gunther Prozen, Thaddeus Valentine, Hajime Busuzima, Thornheart (deceased; killed by Milinda Brantini), Dr. Ellie Staple, Kain (RESTOL Special Rescue Squad) (deceased), Flinty McCallahan (deceased), Greta Hideg, Matori, Gozu (Pokemon), Mikie Okamine, Masakuni Mido, Jail Scaglietti, Gabby Jay, Alva, Kuroto Dan/Kamen Rider Genm (formerly), Rustal Elion, Carta Issue, Iok Kujan, Gallus Bauduin, Elek Falk, Iznario Fareed, Nemo Baklazan, Julieta Juris, Wolf Rocky, Knight Unryuji (formerly), Shia Kijima, Wilfrid Kijima, Saga Adou, Swartz, Uhr, Ora, Tid, Nom Nom, Valerie Da Vinci
Neutral: Lucifer Langdon
Enemies: Luigi Latorre, Hibiki Tachibana, Tsubasa Kazanari, Chris Yukine, Maria Cadenzavna Eve, Shirabe Tsukuyomi, Kirika Akatsuki, Miku Kohinata, Souji Tendou/Kamen Rider Kabuto, Arata Kagami/Kamen Rider Gatack, Ruuji Familon, Arashi (Zoids), Midori, Heero Yuy, Kira Yamato, Setsuna F. Seiei, Bugs Bunny, Marika Kato, Milinda Brantini, Sento Kiryu/Kamen Rider Build, Milinda Brantini, Dominic Toretto, Greg Heffley, Tsubomi Kido, Wade Owen Watts, Shouya Ishida, Hei (Darker than Black), Ryuga Banjou/Kamen Rider Cross-Z, Soichi Isurugi, Misora Isurugi, Sawa Takigawa, Eiji Hino/Kamen Rider OOO, Professor Kukui, Professor Burnet, Kouta Kazuraba/Kamen Rider Gaim, Kaito Kumon/Kamen Rider Baron, Mitsuzane Kureshima/Kamen Rider Ryugen, Takatora Kureshima/Kamen Rider Zangetsu/Zangetsu Shin, Suzuka Kamiki, Gas-House Gorillas, Kazumi Sawatari/Kamen Rider Grease, He Jin, Hyde Kido, Bastion Misawa, Horrid Henry, Mirei Mikagura, Etemon, Volcamon, Yūna Yūki, Mimori Tōgō, Fu Inubouzaki, Itsuki Inubouzaki, Karin Miyoshi, Sonoko Nogi, Hiroki Nagase, Masaru Ooyama/Akaba, Syuuya Aikawa/Aoba, Syoukichi Mihara/Kiba, Futaba Ichinose, Chitose Karasuma, Kenzo Tenma, Kudelia Aina Bernstein, Atra Mixta, Wataru Kurenai/Kamen Rider Kiva, Kivat-bat the 3rd, Kate Green, Gentoku Himuro/Night Rogue/Kamen Rider Rogue, Rinna Sawagami, Nariaki Utsumi, Akari Tsukimura, Leena Toros, Aila Jyrkiainen, Mitsuya Majime, Hester Shaw, Kouhei Araki, Jiro, Ramon, Riki, Leo Conrad, Sally Land, Seraphimon, Cherubimon (Good), Ophanimon, Guardian Eatos, Kuroto Dan/Kamen Rider Genm, Knight Unryuji, Rona Tsunomori, Rei Kiriyama, Yuinshiel Asteria, Rena Asteria, Hazuki Kagimura, Touma Kamiyama/Kamen Rider Saber, Rintaro Shindo/Kamen Rider Blaze, Kento Fukamiya/Kamen Rider Espada, Ren Akamichi/Kamen Rider Kenzan, Ryo Ogami/Kamen Rider Buster, Tetsuo Daishinji/Kamen Rider Slash, Grizzly Bear, Panda Bear, Ice Bear, Yuri Miyata, Megumi Meguro, Joe Maya, Rene Ai, Mike Coil