Simplify the following text for a Grade 5 native English-speaking person.
Original: The character first appears in the Dragon Ball manga , followed by Dragon Ball Z. Frieza also appears in the television special Bardock : The Father of Goku , a few Dragon Ball Z movies , the side story The Plan to Eradicate the Saiyans , and in Dragon Ball GT .
Simplified: Because of this , he ends up fighting the heroes of Dragon Ball Z so he can get the Dragon Balls .