From what I've seen, Sonic 2 was originally going to have a secret battle where Tails betrays us and we would have to kill him This idea was ultimately discarded for being too violent for a Sonic game, as Tails would have died in the Death Egg explosion after defeating the death egg robot, followed by a screen showing his corpse. What they were thinking?

sonic fights a 8 year old genius 💀

my god its a music genius