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The games Comix Zone and The Ooze are only available in the Japanese version of Sonic Mega Collection. They can be unlocked through button codes:
• Comix Zone - Press Up, L, Down, R, Up, Z, Down, L, Up, R, Down, Z in the Options menu.
• The Ooze - Press Z, Z, Z, Up, Up, Up, Down, Down, Down, L, R, Z in the Manual menu.
Both games were eventually included in all versions of Sonic Mega Collection Plus, which was released for PlayStation 2 and Xbox.
• Comix Zone - Press Up, L, Down, R, Up, Z, Down, L, Up, R, Down, Z in the Options menu.
• The Ooze - Press Z, Z, Z, Up, Up, Up, Down, Down, Down, L, R, Z in the Manual menu.
Both games were eventually included in all versions of Sonic Mega Collection Plus, which was released for PlayStation 2 and Xbox.
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subdirectory_arrow_right Sonic Advance 2 (Game)
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In Sonic Mega Collection, there is a trailer for Sonic Advance 2. The trailer features a song that is not used in the final game, and it's unknown what the song would have been used for.
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There are unused movie files in the game. The names of the files are: sample.sfd, loopbgv.sfd and smpinter.sfd. These were made to show off CRI's Sofdec video compression capabilities and are not related to the Sonic series.
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