Gerimoniuy is seen only in Wii Sports
Wii Sports Club[]
In Boxing and Tennis. In Boxing he is level ★8 and in Tennis he is level ★6.
However, if in Baseball, you can have the bat be...broken? Yep, he throws so fast the bat breaks!
His rank is only shown as 1★ so his skill is unknown and the Impossible Miis category can't fit him as this could only be a bug.