Dragon Ball: Yo! Son Goku and His Friends Return!!.
It's a short movie came out recently
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Yes.
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Assuming you meant Tarble (Vegita's little brother) he's in the
last Dragon Ball Z movie Yo son Goku and his friends return Which
is a movie in the DBZ series.
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In 2008 there was Dragon Ball Yo! Son Goku and his Freinds
Return. In 2010 there was Dragon Ball V were Goku merges with the
Magic Dragon Shenlong. Now theres talk about Dragon Ball AF were
Xarorvic Gokus son with Princess Snake when she makes love with him
on Snake Road