Rap stars Snoop Dogg and Master P sued Walmart Inc. and Post Foods LLC, claiming the consumer giants conspired to crush their Snoop Cereal, intended as a model for other minority-owned brands.

The musicians’ company Broadus Foods LLC accuses the world’s largest retailer of hiding boxes of its cereal — Fruity Hoopz With Marshmallows, Frosted Drizzlers and Cinnamon Toasteez — in its stockrooms to keep them off the shelves at Post’s instruction.