Honey bunches of oats would be my favorite. but i more often find myself taking a little bit of one thing with another. Captain crunch with fruity pebbles 50/50 is good.
Rice krispies + Lucky charms marshmallows = win. They used to make it in the '80s as "Fruity Marshmallow Krispies," but now I have to go to the local cereal restaurant to have it custom-made
I wouldn't say it's the whole country; weird things-- like this particular restaurant-- happen in college towns, especially when they're about half a block away from campus.
Toppings == stuff you'd usually find in cereal. Think bare cornflakes, cocoa puffs, etc., with stuff like marshmallows, fruit, chocolate, etc. to make your own. Crazy, yes, but also quite delicious, not to mention cheap eats!