I gotta admit I was a bit ignorant & curious about who or what Badtz-Maru really was and thought a few others might be too so according to Wikipedia:
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Badtz-Maru, or "bad penguin", is one of the many fictional characters produced by Japanese corporation Sanrio. It is one of the few characters that is marketed to both males and females.
Official profile of Badtz Maru
Name: Badtz Maru
Birthday: April 1, 1993
Place of birth: Oahu, Hawaii
Pet: Alligator named Pochi
Friends: Pandaba, a Giant Panda who always wears a very short red skirt, and significant other Hana Maru, a white seal
School: Gorgeous Academy, enrolled in the 1st grade
Residence: Gorgeoustown, lives with mother and pinball-playing father
Description: "Has dreams of greatness when he grows up, but for now he rolls his eyes at his humorous life in Gorgeoustown."
In Japanese "badtz" (batsu) is a term for X, the cross signifying a wrong answer. "Maru" is a term for O, or a correct answer. So, Badtz Maru not only means "bad penguin;" it is also a pun that means "wrong-correct," and is frequently represented by "XO". Indeed, with his friends Pandaba and Hana Maru, Badtz runs the mischievous XO clan.
Badtz-Maru was the mascot for the 2006 FIBA World Championship of basketball, which was held in Japan
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