Sonic Advance 2 - Cheats & Tips - from Nintendo Power Issue 166 - March 2003 : r/retrogamingmagazines

Cheats - Sonic the Hedgehog 2 - Rings & Coins

Sonic the Hedgehog 2 Cheats & Cheat Codes for PC, PS4/5, Switch, and Series X/S - Cheat Code Central

Every Cheat Code in Sonic Origins

Sonic the Hedgehog (1991), A Gamer's Cheat Codes Wiki

Sonic the Hedgehog 2 (8-Bit) - Sonic Wiki - Neoseeker

REVIEW: Sonic the Hedgehog 2 (Mobile) - oprainfall

Proto:Sonic the Hedgehog 2 (Genesis)/CENSOR Prototype - The Cutting Room Floor

Here's Some Cheat Codes You Can Use In Sonic Mania – NintendoSoup

Steam Community :: Guide :: Sonic Mania Plus Secrets & Cheat Codes

Non-Jailbroken Hack] Sonic The Hedgehog 2 Classic v4.7.2.4 +1 Cheat [ Free I-AP ] - Free Non-Jailbroken IPA Cheats - iOSGods