• The name "Chacu Challhua" may come from "Chuku Challwa", which is Quechua for anchoveta, a type of Peruvian fish.
  • This is the strongest Fish-Type monster in the game. It's design is based on the Orca geoglyph, which makes it being a "fish" odd (noting that Orca Mega-Fortress of Darkness is a Sea Serpent, which is also silly).
  • This is the first Earthbound Immortal to have two "personal" effects, (other than the ability to attack directly and not be attacked.)
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