The music used in Sonic & Knuckles is used in the combined game. It also shows the amount of Emeralds collected. Save slots now display information about continues and lives remaining. Game progress can be saved in Sonic & Knuckles by using Sonic 3's save feature (there are now 8 save slots instead of 6). There are also several other notable differences when playing these two combined games. Tails has no Hyper form, but the Super Emeralds are needed for him to transform into Super Tails, as the Chaos Emeralds alone have no effect on him. When these Emeralds are collected, Hidden Palace Zone will become available, and Sonic can transform into Hyper Sonic and Knuckles can transform into Hyper Knuckles. The final boss of Sonic 3 is also omitted for Sonic and Tails.Īfter collecting all the Chaos Emeralds of Sonic 3 a new quest becomes available when entering the first special Stage in Mushroom Hill Zone which allows you to collect seven new Emeralds called 'Super Emeralds'. Once these levels are completed the Death Egg falls off screen intact instead of being destroyed, and then the play continues straight to the levels of Sonic & Knuckles. Also, all of the levels from both games are accessible, starting from Sonic 3. Knuckles is playable in the Sonic 3 levels and Tails becomes available in the Sonic & Knuckles levels. There are several noticeable differences when playing the games combined. In Sonic Classic Collection, for unknown reasons, the game was renamed to Knuckles in Sonic 3.

It acts as one large combined game and all the levels from Sonic 3 and Sonic & Knuckles become available. Sonic 3 & Knuckles is a game that results when Sonic 3 is locked-on to Sonic & Knuckles via Lock-On Technology.

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