Both friends start immediately. Sonic still wonders if they can trust the
Doctor, but Tails tries to compose him. Meanwhile, Eggman and Sera play
video games (some kind of wrestling game starring Eggman and Sera), and
Sera, who always looses ("yada yada yada"), asks for revenge every time.
Eggman gets fed up with it, but Sera threatens the doctor she would quit
being a hostage and just leave if he doesn't continue to play with her.
At this moment a giant robot crashes through the wall, and Sera is happy
about the exciting change. Eggman is not so pleased about her jumping
right into the cockpit and pushing buttons, and tries to throw her out
while forbidding her to touch anything. But finally the cockpit closes
and the robot leaves with both of them. Staying behind is a confused
president and a robot holding a sign which says "Bye Sera".
By now, Sonic and Tails have reached the entrance to the Earth of
Darkness, which looks like a giant vortex in the sky. Tails flies into it
with his bi-plane, and Sonic has a hard time to keep his hold on top of
the plane's wings, until they finally crash-land on the ground. Sonic
asks Tails if he is all right, Tails confirms and tells Sonic he should
have a look around. So this is the Earth of Darkness...
Tails checks in what direction they are supposed to go, and Sonic
immediately asks what they are waiting for. After passing quite a few
obstacles Sonic wonders if the whole thing isn't a setup after all,
because there seems to be an incredible amount of traps on this particular
route (spikes, CaterKillers, BuzzBomber etc). But Tails again reassures
him that they are still heading into the right direction. Sonic uses his
famous figure-eight move to gain speed, and finally both disappear in some
kind of Warp Zone. They reappear totally exhausted in a strange city,
which looks similar to post-war New York (complete with car wrecks and
"One Way" traffic signs), void of anything living.
Sonic looks around astonished and wants to know where they are, since he
has never heard that such a place would exist on the Earth of Darkness.
Tails doesn't know the answer eighter... [Comment from Razor: Um, I think
that you meant "either." :) ] ... but tells his friend that they are still on
the right way and suggests
going to a higher place to have a better look. Sonic agrees and they
zip up to the spire of the highest skyscraper around, where they
discover that the whole city is about to sink into the sea. Tails points
out that this could be caused by the Egg-Generator, and that they
should hurry up. Then a lightning flashes, and Tails clings to his friend
worriedly, because he is afraid of lightning (very cute scene).