Pokemon Red Unlockable: Red
You must get all 151 Pokemon and go and see Professor Oak in his lab. At that point he will then give you the diploma.
Pokemon Red Secret Coins
At the Game Corner there are secret coins lying around. You can get these coins by walking around and pressing the A button.
Pokemon Red Invisible Walls in Koga's Gym
If you look at the floors in Koga's Gym you will notice it has lines. In some spots you will see little gaps in the lines. These "gapped lines" are the invisible walls.
Pokemon Red Get the Mimic TM
Buy a Pokedoll in Celadon Mart, then FLY to Saffron and talk to the Copycat. She will give you the Mimic TM.
