The series is Nintendogs (one word). No game titled "Nintendo Dogs" exists. Here's how to play each entry:
| Game | Platform | Year | Key Features |
|---|---|---|---|
| Nintendogs (Labrador / Chihuahua / Dachshund) | Nintendo DS | 2005 | Touch/mic interaction, bark mode (local wireless), contests |
| Nintendogs + Cats (French Bulldog / Golden Retriever / Toy Poodle) | Nintendo 3DS | 2011 | 3D visuals, cats, StreetPass, AR cards, better graphics |
| Nintendogs + Cats (Digital) | Nintendo eShop (3DS) | 2012 | Same as cart; eShop closed 2023 – redownload only if previously purchased |
Tip: Original DS Nintendogs works perfectly on 3DS/2DS (bottom screen touch). Best value: used DS cart + DS Lite ($30–$40 total).