Yoko is a Mii from the Wii.
Yoko originally appeared as one of the 60 CPU Miis to be included with Wii Sports. Since then, she's appeared in Wii Sports, Wii Sports Resort, Wii Party, Wii Music, Wii Fit, Wii Fit Plus, and Wii Fit U. In most of these games, her internal ID is 014, however in Wii Music it is 55. Her Mii data filename is cpu_mii_014.rcd in Wii Sports, mii_014.rsd in Wii Sports Resort, Wii Fit, and Wii Fit Plus, mii_014.ffsd in Wii Fit U, and is cpu_mii_db55.rsd in Wii Music. Wii Party combines all 100 Mii data files into one larger file named mii_rsd.bin in the same ordering as Wii Sports Resort.
As with every CPU Mii, she has Mingling turned off. Her Mii name in her Mii data file is ようこ. In her Wii U/3DS-format Mii data file, she was originally created on a Wii (1).
Her Mii data file does not contain any unused data.
In Wii Music, her Mii data file is slightly different. While it's mostly the same as it is in Wii Sports Resort, it now includes a filled out Mii ID and console ID. Her Mii ID is 80-4f-98-ea and her console ID is c2-3d-21-af. Her Mii ID tells us she was created on August 30, 2006 at 12:06:00 PM.
According to a September 2020 Nintendo leak about CPU Miis, Yoko's nationality is Japanese (Asian).
In the files for Wii Sports, her dominant arm for Baseball (Batting) is right-handed, Baseball (Pitching) is right-handed, and Tennis is left-handed. Her unused dominant arm for Boxing is right-handed. Her Baseball Pitching style is normal. She's ranked 30 in Baseball, 3 in Boxing, and 18 in Tennis. Her group IDs are 4, 0, and 1.
In the files for Wii Sports Resort, her Wii country ID is 1, like all CPU Miis. Her dominant arm for Table Tennis is right-handed. She's ranked 41 in Swordplay, 81 in Basketball, 18 in Table Tennis, and 78 in Cycling. Her unused Canoe and Debug ranks are both 14, matching her ID value of 014.
In Wii Party's Friend Connection game, the default score rankings establish a relationship between Akira (Wii) and Yoko, with them being 2nd in the best pairs category at 68 points (Good Pals).
Yoko appears in promo art for Wii Music playing the galactic congas.
Note that in her Wii Music render, her tie is forest green instead of white.
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This Mii originally appeared on the Wii!
Here's how to recreate them on the Wii:
Names in other languages
USA English: Yoko
USA French: Yoko
USA Spanish: Yoko
PAL English: Yoko
PAL French: Yoko
PAL German: Yoko
PAL Italian: Yoko
PAL Spanish: Yoko
JPN Japanese: ようこ (same as in Mii data file)
KOR Korean: 지숙 (Jisook)
CHN Taiwanese: Yoko
Source: Wii Sports Resort