Third-party developers have always said that when you make games for Nintendo's systems, your biggest competition is Nintendo themselves. With franchises like Zelda, Mario, Pokemon and Nintendogs under your belt, how can you lose? Nintendo has always pushed for creativity and innovation and their games reflect that quite well. The latest sales data from Amazon.com for the Wii and DS shows Nintendo's game-making skills are as strong as ever. On the DS, nine out of the top ten best selling games were made by Nintendo. For the Wii they share the spotlight a bit, only hogging four out of ten. We'll see how that changes once the heavy-hitting titles such as Metroid Prime 3, Super Smash Bros. Brawl and Super Mario Galaxy hit stores. Read below for the full list.

Wii:
1. Wii Play w/ Remote-Nintendo
2. The Legend of Zelda: Twilight Princess-Nintendo
3. Sonic and the Secret Rings-Sega
4. WarioWare: Smooth Moves-Nintendo
5. SSX Blur (pre-order)-EA
6. Rayman Raving Rabbids-Ubisoft
7. Tiger Woods PGA Tour 07 (pre-order)-EA
8. Mario Party 8-Nintendo
9. Trauma Center: Second Opinion-Atlus
10. Call of Duty 3-Activision

DS:
1. Diddy Kong Racing-Nintendo
2. Brain Age-Nintendo
3. New Super Mario Bros.-Nintendo
4. Mario Kart DS-Nintendo
5. Pokemon Diamond (pre-order)-Nintendo
6. Big Brain Academy-Nintendo
7. Nintendogs Lab & Friends-Nintendo
8. Animal Crossing: Wild World-Nintendo
9. Cooking Mama-Majesco
10. Pokemon Pearl (pre-order)-Nintendo