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/Nintendo DS/DSi XL GamePlay [4K] - YouTube
Sonic Rush - Wikipedia
Sonic Rush - IGN
Sonic Rush Adventure (Nintendo DS, 2007) for sale online | eBay
Sonic Rush (U)(Legacy) ROM < NDS ROMs | Emuparadise
Game: Sonic Rush [Nintendo DS, 2005, Sega] - OC ReMix