Found a DSi on EBay. Used condition but doesn't look really beat up at all although I had to buy a stylus separate and I bought Sonic Rush as the first game.
Sonic Rush - NDS - Sam's Club
Amazon.com: Sonic Rush Adventure : Video Games
Sonic Rush
Amazon.com: Sonic Colors - Nintendo DS (Renewed) : Video Games
Sonic Rush Nintendo DS Sega With Manual Retro Game NDS Complete PAL Region | eBay
Sonic Rush Nintendo DS (NDS) ROM Download - Rom Hustler
Play Nintendo DS Sonic Rush (USA) (En,Ja,Fr,De,Es,It) Online in your browser - RetroGames.cc
Sonic Rush - 2004 - NDS Nintendo DS - NO GAME includes manual | eBay