He was reborn as Nigakagagi, the Rainbow Serpent God, from Ultraman Blaze.

Pseudo-multiverse genre, no female protagonist, no human transformations (at most, she transforms into a monster girl).

Note: The Rainbow Serpent God is a primordial deity, therefore the protagonist's initial power level is extremely high, making him virtually invincible.

Also: There is a system related to Pokémon.

If you don't like it, please don't come here~~

world:

[Blaze] → [Legendary Monster Universe] → [Blaze] → [Ex] → [Gaia] → [Super God Academy] (in progress)...