Carlos is a CPU Mii.
Wii Sports
His skill in Tennis is 123,987,236 and plays with Vince. His skill in Baseball is 123,986,236 and plays with some Miis. His skill in Boxing is 123,456,789.
Wii Sports Resort
His skill in Swordplay is 121,456,789 and he defeats you by pressing (-), opposite of Maxmillian. In Showdown, he is the boss of Cliff Reverse. In Table Tennis, his skill is 123,456,859. In Basketball, his level is 118,436,130 and plays with Mackenzie and someone else.
Wii Party
In Wii Party, Carlos is an Expert Mii.