Earth-79203 is a world in which originally was only Battle Fever J, an international team of monster-fighters, including Battle Japan, Battle Cossack, Battle France, Battle Kenya and Miss America, use the Battle Fever Robo to battle Satan Egos and his Secret Society of Egos. This world could be considered as a fragment in the timeline of both Super Sentai, Kamen Rider, Metal Heroes and other Toei's heroes' world and has a history that is completely different with Earth-616.Before Battle Fever J is established after JAKQ, one of the first super hero series in the universe was Kamen Rider (with the appearance of two original Riders in that series, both of them are known simply named 1 and 2 respectively), then followed by JAKQ's predecessor, the Gorangers.
- Though this universe is considered as a "defunct" universe by Marvel, it still exists, thanks to the ongoing Super Sentai and Kamen Rider TV shows. With the appearance of Kamen Rider Decade back in 2009, this would cause the creation of alternate Toei universes (officially known as A.R. Worlds. This means that Super Sentai is on a parallel Earth that is both part of a different multiverse and the Marvel Multiverse.
- Named in the Marvel Master List.
- Characters from Earth-79203
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- Reality Gallery: Earth-79203
- Super Sentai's world and Kamen Rider's world