Michael Jackson's nephew Tj has asked a U.S. judge to dismiss a petition filed by a relative challenging his guardianship of the King of Pop's three children.

Tj Jackson, 35, was placed in charge of Prince, Paris and Blanket in July, 2012, following a family feud, which was sparked by the apparent disappearance of family matriarch Katherine Jackson, who had previously been appointed the guardian of her grandkids following the Thriller hitmaker's 2009 death.

She subsequently agreed to co-parent the youngsters with Tj, but the pair has since been faced with a new fight from Anthony Jackson Ii, who has filed his own legal papers asking to be named the children's new guardian.

However, Tj claims Anthony, who is said to be his cousin, has failed to properly outline the reasons for his petition and he is therefore requesting the challenge be thrown out of court, reports Tmz.com.

In his documents, Tj, son of Tito Jackson, reveals he and Katherine are doing well as co-guardians and insists Prince, Paris and Blanket are happy with the arrangements.