Original Information	Difficulty	Tags	Myth Statis	Information Details
You can avoid Eggmans's attacks by crouching in the Chemical Plant boss fight	Easy	n/a	Confirmed	Crouching with Sonic specifically his quills protect him, so this doesn't work with Miles "Tails" Prower.
There's a secret Hidden Palace Zone in the original Sonic 2	Easy	Research	Busted	First noticed in the sound test as an unused track, it was believed and eventually confirmed to be of a zone shown off in a magazine promo, there was speculation that this zone was unlockable but was identified to be a cut zone from the final game, later rereleases of this game added the zone back in revamped and such, this zone doesn't load anything of the level in the original Sonic 2.
There was a cut out zone from Sonic 2 called Genocide City Zone	Easy	Research	Confirmed	In the beta for Sonic 2 on the level select screen there's a level titled Genocide City Zone, it was confirmed to be a beta level that was scrapped, the title from the team in Japan had a rough understanding of translation, later renamed Cyber City Zone before being scrapped entirely.
Dr. Robotnik laughs if you die in the Death Egg Zone in Sonic 2	Easy	Observation	Confirmed	Robotnik reacts when you hit the Metal Hedgehog as well.
You can cancel a death with debug mode in Sonic the Hedgehog 2	Easy	Cheat Codes	Confirmed