Sonic 2 (Genesis) will be sprite hacked by Game Freak to include Hilda and Bianca from Pokémon someday.
Tails was originally guardian of the Master Emerald.
Think about it. Tails was a replacement for Amy, who was going to be a "spirit" type entity that time traveled with Sonic to retrieve the Emeralds. However, he was changed into a Tanuki, which was dropped because of Tanooki Mario, then into a Kitsune (hence the two tails), which was changed into a fox for American audience convenience.Given this mystical background of What Could Have Been, coupled with his Chosen One status in the American comics, and the initial idea to give him latent powers in the Saturday morning cartoon, makes an interesting origin story indeed. Not to mention the scrapped Hidden Palace level had an end of level obstacle that resembled the Master Emerald, and the level had a Tails 1-Up monitor which lead those to believe it was a Tails only level.
- Jossed. According to the devs, the Master Emerald was never planned for Sonic 2.
Dr. Robotnik is secretly the real CEO of BP.
- The oil spill in the Gulf of Mexico was another of his evil schemes to recreate the Oil Ocean Zone.
The Hidden Palace was always connected to the Mystic Cave Zone and was where Robotnik was researching more into the Chaos Emeralds as well as making preparations on the Death Egg.
The 2013 iPhone/Android version has you enter Hidden Palace zone via what was once a dreaded spike pit in the Mystic Cave zone. In most timelines (i.e, most ports of Sonic 2) the entrance is blocked off by spikes as Robotnik knew Sonic would probably trail him here and block off this route to buy himself some time.In the new version's timeline, Sonic and Tails got there faster than expected before Robotnik could finish plugging the holes, thus they could get into the Hidden Palace where Robotnik was hiding. He had enough time to change its once hauntingly beautiful theme music though.
Sonic lets Eggman outrun him.
Since by that point he hasn't fought Eggman in the Death Egg, just a robotic Sonic, he probably figured Eggman had something else to fight with, and wants to take Eggman himself on. Sonic and Tails are the owners of the Casino Night Zone.
Why else their names and faces would be all over the place? Wing Fortress took off while it was still under construction.
Looking at Wing Fortress' level map
◊, it looks very unfinished (not in a level design way, as in an aesthetic way). Sonic and Tails may have been too quick for Eggman, and forced him to take off with an unfinished Wing Fortress. West Side Island's name is connected to the creation of Angel Island
Angel Island was hidden in the sky beyond man's reach in ancient times, shortly after the entire Chaos debacle that spelt the destruction of the ancient Echidna civilization following the massacre of the Chao. The partial island landmass where the Master Emerald was enshrined would be sent into the sky, leaving a massive crater lake in the eastern half of the original island, which would later be named West Side Island due to a big chunk of the eastern half simply not being there. This chunk of Floating Island is Angel Island itself. This is why the oldest parts of the Mystic Caves conceal a Hidden Palace - it was part of the original ancient underground mining facility that spanned between the Mystic Caves and what would later be known as Lava Reef, the other portion having taken to the sky with the rest of Angel Island.