Best Buy (BBY) and Toys R Us are crying foul over Wal-Mart Stores' (WMT) ad campaign touting its low prices. Electronics retailer Best Buy complained to the Florida attorney general's office, and Toys R Us raised the issue with authorities in Michigan, the Wall Street Journal said. The report cited documents in which the companies claim the ads are misleading or promote products it has only in limited supply. Wal-Mart said it's confident there are no legal or ethical breaches. Wal-Mart shares rose 0.4%. Best Buy shares rose 1%.