EXHIBIT 99.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER Pursuant to 18 U.S.C. Section 1350, the undersigned officer of JAKKS Pacific, Inc. ("JAKKS"), hereby certifies that JAKKS' Quarterly Report on Form 10-Q for the quarter ended March 31, 2003 (the "Report") fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of JAKKS. /s/ Jack Friedman Dated: May 14, 2003 - ---------------------- Jack Friedman Chairman and Chief Executive Officer Principal Executive Officer