The insane depth of SA2 keeps getting more impressive. This is sort of a spoiler, so if you want to know about them, read the full news item.
THIS IS NOT A HOAX! Metal Sonic is one of 6 hidden characters in the game, along with Amy, Tikal, A Chao, Big, and Chaos 0. ALL PLAYABLE IN 2P MODE! You have to get all the A emblems for a character to get their counterpart. Sonic – Amy Tails – A Chao Knuckles – Tikal Shadow – Metal Sonic Eggman – Big Rouge – Chaos 0 There are also costumes hidden in the game that modify each character’s look.