How bad is it? It sat on a shelf for years before being released (and disowned).
Should you see it? No.
Rex (Dex?) Dogtective, voiced by Charlie Sheen, with friends voiced by Hillary Duff and Wayne Brady, fight the evil Lady X (Eva Longoria) to keep the supermarket shelves free from Brand X products. The animation sucks, especially given a reported $65,000,000 budget. The plot is threadbare and the dialog is completely unsuitable for children the age the film aims to please. Dozens of advertising icons, like Charlie Tuna and Mr. Clean, appear. I'm guessing that this was originally intended to be a new "Toy Story," but it's more of a new "Ishtar" or "Waterworld."