Collaborations

Collaborations (コラボ) in the Mahou Kaiju Series refer to crossovers with characters and settings from franchises and properties that are outside the rights that Toei, Kadokawa Daiei and Sunrise owned as per the 10-year (extended to 12-year) contract with series creator Sam Imbecile through the aforementioned series. These are done with permission and acknowledgement with the properties' owners, creators and/or publishers/distributors. All the collaborations are canon within the Series.

Super Sonico
In Episodes 36 and 37 of the anime All-Star Taimanin, Super Sonico, an idol mascot created by Tsuji Santa for the company Nitroplus, appeared as a guest character.

Magic: The Gathering
Shortly after the Super Sonico collaboration, on November 25, 2029, Sunrise confirmed in a Twitter post that characters that come from the card game Magic: The Gathering would be part of the Mahou Kaiju Series with permission given by Wizards of the Coast, first appearing in the anime All-Star Taimanin and Young Braves Brigades. In the series' lore, Emrakul and other Eldrazi were actually Brain Flayers, some of the most powerful and fearsome of their kind, and multiversal Planeswalkers such as Nicol Bolas were actually part of a pantheon of Ancient Gods that waged war against a legion of "beyond-transcendental abominations" prior to the creation of the Mahou Kaiju Series universe.

Tokyo Necro: Suicide Mission
In the anime Tokyo Necro: Operation Requiem, which was based on the video game Tokyo Necro: Suicide Mission developed by Nitroplus, characters from All-Star Taimanin make a guest appearance in an episode. The four Taimanin Kotaro Fuuma, Asagi Igawa, Asuka Koukawa and Yukikaze Mizuki were transported into the Tokyo Necro universe (which was one of the many unstable dimensions were formed as byproducts of the spatial-temporal influx caused by the formation and existence of the three main universes in the same space-time vicinity and wavelength at the time), and needed the help of Ippa Yamanashi and his friends to bring them to their home dimension.

Mashin Hero Wataru
While originally listed as a collaboration with the series, Sam wanted to fully integrate the world of Mashin Hero Wataru into it, and as such, the property and its characters and setting became an official part of the series' universe, starting with the TV series Mashin Hero Wataru: Return of the Saviour as part of the original show's 40th anniversary.

Magic Knight Rayearth
CLAMP agreed with Sam to have characters from the manga and anime series Magic Knight Rayearth guest-appear in the series briefly for the three-episode online mini-series Mashin Showdown: Rayearth × Wataru, which serves as the crossover between the two franchises.

Mobile Suit Gundam
During the first few years of the Mahou Kaiju Series’ run, Sam Imbecile spoke during an anime conference in Tokyo in 2023 that the chances of an incarnation of Getter Robo or Mazinger Z appearing in the series was very slim, although they were eventually incorporated into the series proper discreetly through the anime The Hows of Me and Liliana in 2024 and Mazinworld in 2029 respectively. He also said that he was against including Gundam in the Mahou Kaiju Series, despite the company behind the franchise Sunrise being a primary animator for the Series, since he had no idea how he would incorporate it in a universe where it is somewhat confirmed that Gundam is already a media franchise there. However, as years would pass with the popularity of the Series soaring, Sam eventually grew warm on the idea that the Mahou Kaiju Series universe "might need a Gundam".

In 2029, with the appearance of Getter Robo in the Series, consideration by Sam at the time on the inclusion of Mazinger, and the approaching 50th anniversary of the Gundam franchise, plans were made to create an original Gundam series with Sotsu and Sunrise set place in the Mahou Kaiju Series universe, which would become the 12-episode anime Mobile Hero Dai-Gundam, where its characters, inspired by the Gundam franchise which exists in-universe, decided to make and commandeer their very own Gundams. To commemorate the anniversary, its last three episodes saw the guest appearances of Amuro Ray, the first Gundam protagonist, the crew of the Londo Bell, including its captain Bright Noa, and Amuro's rival Char Aznable.

In a Twitter post written by Sam on December 2, 2030, he said that the "Mecha Trinity of Mazinger Z, Getter Robo and Gundam is complete in Mahou Kaiju Series".

Reception
The collaborations were received with general positivity and praise from fans of the Mahou Kaiju Series and the franchises that it crossed over with.