Let's all listen to....

Asterix and the Great Rescue Music (Mega Drive/Genesis)

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 Spoiler

 Stages

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 Boss themes

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This one was also used in the Master System/Game Gear version. You know what's bizarre is that you have to fight Cacofonix on 3 of the versions.

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Boss themes from level 2 to 5 (unused) are the same, except they add in more melody as the game advances. The music of the boss fight at level 5 was not used for some reason.

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Enjoy. And no, I do not own these videos.