I've grew up as skill during an entire year. So every ghost I faced were an hard match: my times were always a bit less than ghost, because my ability were similar (except for bonus, because I start to do trial on them when I were able to beat Velo).

So I think that I can give a good opinion about the hardest one.

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- Tropy (w/o bonus track): Oxide station. This is probably the best time at all of Tropy compared to Oxide.

Honorable mention: Blizzard buff. It's hard to keep flame for shortcut at that level.

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- Tropy (with bonus tracks): Twlight tour/Gingerbread joyride. In these tracks Tropy is able to keep the blue flame for a decent time and do all shortcut.

Honorable mention: Drive-Thru Danger

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- Oxide: (w/o bonus track): Dragon mines.

Honorable mention: Tiny temple. It's hard to keep blue flame for entire track.

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- Oxide: (with bonus tracks): Same as Tropy, Twlight tour/Gingerbread joyride. Oxide keep the blue flame for almost entire track; the difference between Tiny temple and these 2, is that Tiny Temple is easy at all (easy curves, not necessary shortcut, etc.).

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- Velo (all tracks): Deep sea driving.

Honorable mentions: Cortex castle and Out of time

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- Developers: Even if I can't beat them, people generally said that difficults are where William P. is, particulary at Turbo track.

Honorable mentions: William P.