These Two Have Appeared In The Same Thingさんのイラストまとめ

Marshmello and Deadpool (Marvel Comics) appear in Fortnite together

Lou Bega and Pikachu both appeared in a Kids' WB promo together

Green Lantern (DC) and Colonel Sanders appeared in a comic together

Sonic the Hedgehog and Steven Universe have appeared together in an Apple Arcade advertisement.

Arbiter (Halo) and Rash (Battletoads) appeared in Killer Instinct (2013) together

James Pond and Sonic the Hedgehog have appeared together on promotional art for James Pond 2: Operation Robocod

Homer Simpson (The Simpsons) and Wheatley (Portal 2) appeared in LEGO Dimensions together

AiAi (Super Monkey Ball) and a Xenomorph (Alien) appeared on a 2009 SEGA holiday card together

Sonic the Hedgehog and Baby Shark both appear in Monster Super League

The Pyro (Team Fortress) appeared with the Patriarch in the Killing Floor.