Guest B

Guest B is a Pre-loaded Mii available for use in titles that feature Mii support, which includes Wii Sports Games.

Super Smash Bros. for WiiU & 3DS
The design of the Mii Brawler used in promotional material and in-game renders is based on an edited version of Guest B. Of the three, the Mii Swordfighter has the least drastic change in design; simply changing the design of his hair and widening the eye placement a bit.