can two bag motors be used with one controller

Is it legal to run two bag motors off of one rev spark motor controller?

No, only a few motors are listed in the manual as allowing 2 motors per controller, and the bag motor is not one.
Edit: Refer to this table in the game manual for motors allowed 2 to a controller. here

Do you know what motors are allowed to be linked?

and

Where in the manual could i find it?

It is named table 4-4 in part 4 of the game manual, which is Robot Rules. It’s on page 28.https://firstfrc.blob.core.windows.net/frc2016manuals/GameManual/FRC-2016-game-manual-04.pdf

Do you know what page it is on? I cant seem to find it.

Read rule R53 starting on page 27

thanks a ton!!