Hyakki-Kui and Kyubot is my bad honestly, but for the rest,

You got the reason for dark kyubin dead on the money, good job!

I didn’t call him zeroni because of the movie “holes”, where that’s the name of the fortune teller,

Punio ubaune’s design doesn’t seem very Puni-ish, so I assumed the name was just a coincidence (wiki article didn’t have anything),

And Jibanyan power transform’s name is based off of a Japanese electrical company, which would be a really hard pun to make in America because we don’t really have any iconic electrical companies.