- This card appears to be based off of the character Williams from the Bruce Lee film Enter the Dragon, played by Jim Kelly.
- His afro is actually a wig, as shown in the artwork of "Weed Out".
- This card has the same ATK, DEF, Level and Effect as "Plague Wolf".
- Although partially obscured, the Japanese characters behind Karate Man appear to spell out 花鳥風月 (kachōfūgetsu). This is a four-character compound made up of characters for flower (花), bird (鳥), wind (風) and moon (月), which are regarded as classic elements of Japanese aesthetics, and representative of the beauty of nature.
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