Champion RZ7C or NGK CMR7H are listed as equivalents but check thread length and porcelain length.
Most all brand spark plug brands are on the cross reference including Champion. Some of the brands that cross reference to Champion are Autolite and Denso,
8902 cross reference plug
There is no Champion spark plug with the part number 696798. There is a Briggs and Stratton part number 696798 that does cross reference with a Champion RJ 19LM.
RC12YC in Champion