OH MAN. This one is actually kind of hard for me as I struggle to remember game box art (I mostly had second hand carts or... totally legitimate copies smiles) but oh man does the first Mega Man's US boxart holds a lot of "I love this, it's dumb"

Sonic 3's US boxart is also kinda funny 'cus Knuckles is just there in a fucking bush

Warioland: The Shake Dimension is also pretty up there too in actually looking fun

How about Kirby Planet Robobot 'cus Kirby just looked excited to be in A MECH