|Favorite Color||Royal Blue|
|Level||Tennis: Level ★10
Baseball: Level ★10
Boxing: Level 7
|CPU Rank||Master Difficulty|
In Wii Party U, Joost is in Master Difficulty.
- In Super Snow Sliders, he is in 2nd place, traveling a distance of 53 yards.
- In Stage 2 of Tabletop Gauntlet Time Attack, he is in 1st place with a time of 1:30.00.
- He also has the 2nd-highest value on Advanced Dojo Domination with 20 opponents defeated.
- In 3-Player Button Smashers, he, Joana and Jeff hold 2nd place with 30 points.
- In Freeplay Snap Judgement, he holds 1st place with 20 points.
Names in Different Languages
Japanese: ヨースト (Yōsuto)
- According to the Wii Sports Club files, Joost's Internal ID is 085.
- In the data files of Miitopia, he is listed as Child.
- He appears as a ghost in GCN Baby Park in Mario Kart 8 and according to his profile, he is Dutch.
- In his Wii Party U artwork, he seems to be playing Sketchy Situation with Rie, Gerald, and Mi-sun.
- In Wii Party U, he appears as P1 in the preview video for Battle of the Minigames.
- Joost also appears in the preview videos for Cage Chomp and Spiked-Ball Brawl.
- Even though Joost uses a mouth that doesn't use lipstick, it is set to be pink instead of the default orange color. This might be a remnant of an earlier Mii design for him.
- This suggests that Joost was originally planned to be a female Mii since no male Miis use pink lipstick.
- His height value is set to 35 and his weight value is set to 57.