Here we have Tatsuaki from "Tomodachi Island" in the Metro Kingdom and is known to be a Pro Tennis Player from the M.I.I. Sports Club.
Tatsuaki in my Mario/(Crossover) Fanfic gets annoyed by the antics of the pseudo-genos, during the time Big the Cat got stuck in a warp pipe near Tomodachi Island.
According to Wii Sports Wiki, Tatsuaki is known to have a skill level of "1900" in tennis, thus this makes him a Pro in tennis. He also has a skill level of "790 to 975" in boxing and has a skill level of "645 to 845" in baseball.
(Tatsuaki is not my character, he is the intellectual property of Nintendo).
A friend got me into shipping these two a while back so I decided to include them as a ship in the AU. Reference image below the cut. Yes it's a catradora redraw.
Tatsuaki's direct family has their own private island just off of the coast of Wuhu Island since they care for a LOT of animals. Tatsuaki actually owns over 90% of Wuhu's animal population-
CPU Miis have never had confirmed relations. Background information about the Miis is usually very rare or otherwise non-existent. Even Miis who look quite similar, such as Abby and Ashley, Rin and Ren, and Matt (Wii) and Ray do not have confirmed relationships, and thus, as far as canon is concerned, are complete strangers to each other.
However, there are a very small few examples of relationships between Miis. In Wii Party, on a blank save file, the rankings for the game Friend Connection contain 20 friendships between CPU Miis. This list is as follows, from best friends to worst friends:
1. Matt & Lucía, 70 points
2. Akira & Yoko, 68 points
3. Takumi & Steph, 66 points
4. Tyrone & Sakura, 64 points
5. Víctor & Emma, 60 points
6. Hayley & Jackie, 58 points
7. Pierre & Eva, 56 points
8. Theo & Rachel, 52 points
9. Rin & Silke, 50 points
10. Keiko & Martin, 48 points
11. Steve & Yoshi, 46 points
12. Chris & Ai, 44 points
13. Shouta & Maria, 42 points
14. Mike & Ashley, 40 points
15. Anna & Sarah, 38 points
16. Luca & Jessie, 36 points
17. Andy & Alex, 34 points
18. James & Haru, 30 points
19. Saburo & Miya, 28 points
20. Tatsuaki & Abby, 26 points
While these are all friend relationships, there haven't been any confirmed family relationships for any of the CPU Miis, until Wii Sports Club. In Wii Sports Club Tennis, the description for the stamp "Dethroner of Champions" mentions that the current Tennis champions are "Queen Sisters", thus making Barbara (Wii U/3DS) and Alice the only confirmed family relationship in the entirety of CPU Miis.
Images by Wii Facts Plus, via taking screenshots in an emulator (Wii) and on actual console (Wii U).
ACTUALLY I CAN't sleep due to anxiety reasons so here's a non-exhaustive list of why matcia is frickin great (brotp, otp, whatever you want idc)
• wii sports resort, they're Those Two notorious miis who are ridiculously hard to beat. matt because he's champion of multiple sports and basically psychic, and lucía, well... GODDESS OF TABLE TENNIS, you can't even beat her by LUCK
• and then in wii party they're the highest difficulty so clearly they're experts at life itself
• speaking of wii party... FRICKING. FRIEND CONNECTION GAME
• they have the highest score and there's this cute af picture of them framed up on the wall smiling adorably together in a pretty pink background, and the whole minigame has hearts like literally everywhere and it's all about how ~compatible~ you are with each other and being able to ~connect~ with the other person and it's lowkey a dating sim oh god nintendo do you realize you ruined my life???
• they're such a goddamn power duo
• oh and like it's interracial too? considering fandoms sTILL tend to sleep on interracial ships i think this is a win
• ahhhhhhHhhHHhHH how could i forget they have the same favourite colour??? they do!!! what are the odds of that? (it's orange, btw)
• seriously i can't get over this. nintendo spent a total of 1 (one) lore point on mii personality (as opposed to island backstory) and they dedicated it to making these two absolute besties. just iconic.
• (well okay they also dedicated a lore point to making abby and tatsuaki hate each other which is equally iconic tbh but that's not the point of this post)
• THE PICTURE. I'M NOT OVER THIS. NO REALLY THE FACT THAT THEY FRAMED A PICTURE OF THESE TWO TOGETHER ON A DATE IN THIS ROOM FULL OF GIANT PINK HEARTS. THESE TWO I SWEAR TO GOD.