yes
Because SEGA decided not to have any unlockables.
If I know what you're talking about, it lets you enter any code for sonic classic collection for your country and it will (most likely) work.
No. Sonic R is not on the gamecube version or any version. it is only in Sonic Gems Collection.
It is most likely that they will be unlockables in upcoming games.
Knuckles Chaotix was released for the SEGA 32x and no, that was it's only release.
theres modern and classic sonic so no but you can download character mods
This is the same for any version of Sonic the Hedgehog 2. The sound test is in the options menu.
There are secret unlockables for SVR 08 but only in the UK.
It's already there, Sonic the hedgehog, Sonic the hedgehog 2, Sonic the hedgehog 2 and Knuckles, Sonic the hedgehog 3, Knuckles in Sonic the hedgehog 3 and Sonic and Knuckles are all the games that are in Sonic Classic Collection, they are available straight away.
i haven't found any unlockables yet.
Sonic The Hedgehog: After it says Sonic Team Presents, at the start of the game, Press: Up, Down, Left, Right, Y + Start and you can choose any level. Sonic 2:There is none. Sonic The Hedgehog 3:At the drum beat hurry and press up up down down up up up.Go down twice and you will see sound test. Sonic and Knuckles: Start Mushroom Hill Zone as Sonic. Head right until you come to the first Pull-Up machine. Jump and hang on it. Then, Press Left, Left, LEFT RIGHT RIGHT RIGHT UP UP UP then get a game over at where you select sonic or knuckles hold Y+START THEN CHOOSE A LEVEL (THE NUMBERS ARE SONIC TAILS AND KNUCKLES) That's how you go to Level Select in Sonic Classic Collection. (Note: If I got some thing not right improve my answer)
beat him any character in classic(not story)mode