The Moon Zone (Sonic only if all Chaos Emeralds are collected.)
8 (Final Level)
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If the player finishes the X-Zone as Sonic the Hedgehog, with all seven Chaos Emeralds collected and the other three character's completed, then the player is granted access to the extra zone, the Moon Zone. The three bosses in this zone are the Eggmobile with a wrecking ball from Sonic the Hedgehog , the Drill Eggman from Sonic the Hedgehog 2 and the new Egg X.
Sonic Pinball Party
The X-Zone appears as one of the pinball arenas in Sonic Pinball Party. As with Sonic Advance, this is the last stage when the player plays the Sonic pinball tables.
- The first two bosses in this zone are based off of the first bosses of the first and second games. The battles also use the respective boss music from these games.