Sonic Adventure
Nights has appeared in many other games besides the series, including "Sonic Adventure" (in the Casinopolis level), "Sonic Adventure 2" (in the City Escape and Radical Highway levels), "Shadow the Hedgehog" (in Lethal Highway, the title screen appears in a billboard without any text), and also in "Sonic Adventure" and "Sonic Adventure 2", the player can raise a chao that resembles Nights. Nights also appears in "Sonic Pinball Party", "Sonic Shuffle", "Billy Hatcher and the Giant Egg", "Sega Superstars", both "Sonic Riders" and "" (as a secret character) and "Sega Superstars Tennis". Nights also makes a cameo appearance in "Sonic &amp; Sega All-Stars Racing" as the flagman, and later appears playable alongside Reala in "Sonic &amp; All-Stars Racing Transformed". The character also makes a cameo appearance in a downloadable level of "Sonic Lost World". The level is named Nightmare Zone, which consists of multiple boss battles from the original game in the series.