Go to the bar in Goland Coal City and listen to the rumor of the "Ghost of Colliery" After this, go to Lesalia and the screen should shown a scene of a bar. When you leave, invite Beowulf to join your party. Now that you have Beowulf, go to Goland Coal City and you will fight 4 battles here and save Reis. After you save Reis you will get a Zodiac Stone that will trigger the steel ball.
Return to Goug Machine City again and add the Robot to your party. Now that you have the robot, go to Nelveska Temple. You will fight another robot... defeat him (which shouldn't be a big problem by now) and you will recieve a stone that will bring Cloud to your world. Be wary however.. the robot must be defeated twice to be truly done for.
Now go back to Goug Machine City and
you will trigger the time portal machine
and it will suck Cloud from the future
bringing him to your world.
Now go to Zarghidas Trade City and save
Cloud from the thieves that appear to be
assaultig Aeris. Note: if this part
make sure that you killed Dycerag and
his Zodiac Soul Adramelk.
When Cloud joins your party, he is not
much of a fighter. You'll need to
find his Materia Blade so that he can
use all of his limit attacks from Final
The Materia Blade is located in the
Bervania Volcano. Set someone on
Move-Find Item, then go to the highest
point on top of the mountain in the
corner of the screen. It's difficult to
get to the top without some special
height ability, but keep trying if it
doesn't work the first time. To be
honest, Cloud is not the best addition
to your party (especially since he
starts out on level 1) but he is a
welcome addition to those particularly
fanatical FFVII fans. ^_^