In a motion filed on Dec. 10, John Quinn of Los Angeles-based Quinn Emanuel Urquhart & Sullivan said the associate, Jill Basinger, worked for his firm from 2002 to 2006. During that time, both as an associate and of counsel, she billed nearly 1,500 hours working on several cases for Mattel, including the one against MGA Entertainment Inc., maker of the Bratz dolls. She also was privy to intellectual property and other confidential information at Mattel, the motion says.

“Glaser Weil committed the cardinal sin under the disqualification cases — it hired an attorney who worked on the other side of this very case,” Quinn wrote in the motion. “No amount of spin and no ethical wall can change the fact that disqualification of Glaser Weil is required.”