Chestnut, eh? Hmmm, I'm relatively sure that goombas aren't "chestnuts" in Japanese. If I'm not mistaken, I think that Goombas are called Kuribos in Japan. Maybe "kuribo" is very similar to the word for chestnut?
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"I''m not a good shot, but I shoot often"- Teddy Roosevelt
"Sling enough led you''re bound to hit somethin''"- My bro