I don't think there is a word for it so you can either use tetherball or make a new word. Tether = Tjuder (from Tjudra) so Tjuderboll would be a literal translation, it doesn't really sound nice though and noone will have a clue what you're talking about so I'd suggest you use Tetherball and then explain the game.
And is "och" in swedish.
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Tetherball The Movie - 2010 was released on: USA: 2011
"King" in Swedish is "kung".
Apple is äpple in Swedish.
"Goal" in Swedish is "mål".
Suedoise is French for Swedish.
Equality is "jämlikhet" in Swedish.
School is skola in Swedish.
Adventures is äventyr in Swedish.
29 is tjugonio in Swedish.
Small is liten in Swedish.