The manufacturer of Bratz dolls has replaced its lawyers for the second time this year in preparation for the next phase of its long-running copyright battle with Mattel Inc., which makes Barbie dolls.

MGA Entertainment Inc. is appealing a recent ruling by U.S. District Judge Stephen Larson of the Central District of California that upheld a $100 million jury verdict reached last year against the company for copyright infringement and breach of contract. A second phase of the case is expected to focus on, among other things, Mattel’s claims that MGA stole trade secrets.