In Gravity Falls, we see these three items fall through the portal accidentally; That’s not a big deal… UNTIL we see an episode from Rick and Morty, where Rick C-137 puts up a bunch of portals to confuse the Citadel of Ricks on where he went; In one of those portals, is a “blink and you’ll miss it” type thing where we see…; THE SAME 3 ITEMS!!! This proves that Rick and Morty and Gravity falls are connected!