Yes, include a copy of the joint return actually filed. The mock returns are for your records and should be kept with your tax files in case the state of California questions any of the items you've split and reported separately on your married filing separately CA state income tax return.
Please note, the community and separate property rules must be applied when determining if the nonresident spouse is required to report California sourced income.
Click this link CA - married filing
separately guidelines for more information.
