Puss Gets the Boot (1940)
Spike refers to the "Tom and Jerry" cartoons.
Referenced by name.
Alex Bolton mentions Tom & Jerry.
Werner Werman and the cat seem are reference to this early Tom and Jerry design (called Jasper and Jinx in this short) down to the color palettes and high-pitched screams.
Ice-T mentions Tom and Jerry
Snart says to Siren X, "Save us the 'Tom and Jerry.'"
Tom and Jerry mentioned in dialogue.
Cartoon is talked about, clips shown.