Nintendo DSi in Cereal Boxes? Never Happened (But Promotions Existed)

No. A full DSi console (~$170 value) was never a cereal premium.

Actual Cereal Promotions

• In-Game Codes: Unlock costumes, items, Pokémon (e.g., Kellogg's + Pokémon).
• Small Toys: Figurines, spinners, lenticular cards.
• Sweepstakes: Enter codes online for chance to win console, games, trips.
• AR Cards / QR Codes: 3DS/DSi camera mini-games.

Logistics + cost make hardware-in-box impossible. Best promo: Kellogg's + Nintendo often have eShop credit or game DLC codes.