Level 15:
 
 - Available Team-mates: Wolverine, Iceman, Rouge, Cyclops, Beast, Colussus, 
                         Emma Frost, Gambit, Jubilee, Magma, Nightcrawler, 
                         Jean Grey, Storm, and Psylocke.
 - Hidden Items: Comic Book, Danger Room disc
 - Objectives: Rescue Professor Xavier.
               Release Xavier's trapped mind.

    Third mission in a row. Whipe off the sweat and get ready to go again. When
the level starts head forward. Once you reach the top of the stairs go right to
find an X-Traction point. Do what you gotta do then go left. Make your way to
the top platform. At the top some Spectral enemies attack. They're level two 
versions of Astral enemies. Head all the way to the last room. On the left side
is a comic and on the right is a doorway. Grab the comic and go into the next 
room. Head across the bridge and down to the other side. In the big room at the
end of the bridge you can either go left or right. Go left first and grab the 
Danger Room. Then go right. On the right side you will have to use telekenesis
on the switch. For a short cut you can just jump off the cliff overlooking the
locked door. Now return all the way back to the X-Traction point and head up 
the next flight of stairs. Go through the once locked door. Keep moving forward
to reach another X-Traction point. Use it however you wish then go through the
portal to The Forbidden Halls.

    Move forward up the stairs. At the top kill all the enemies to reveal a 
switch. The right path leads to nothing important. The left leads to also
nothing of importance. So just head through the door. Keep moving through 
rooms until you have to go right. Again just keep going through room after
room until you go down some stairs. At the bottom is one of those moving
platforms. Jump on and ride it over. You will have to ride over as Jean in
order to press the switch. After pressing the switch the door opens and a 
bridge is formed. Move into the portal to go to The Lost Passage.

    Move forward and fight any enemies. Move to the left and in the next room
another locked door. Go down the stairs on the right and move upwards. When you
can move left. You will now be on the other side of the door. Keep going left.
Another locked door. This time go to the left and around the door. Once on the
other side of the door go right. Keep your path till you reach another moving
plaform. Ride it across and run forward to use the switch. Use the switch first
so that your team mates can come to help you fight any enemies. Head through
the door on the left and use the X-Traction point. When done go break the large
crystal. You will now fight the Shadowking as Charles. For more help refer to
enemies section. With the battle won you return to the X-Mansion one last time.
                                 Mission Complete!

X-Mansion:

 - Available Team-mates: Alison
 - Hidden Items: Sketch Book, Danger Room disc
 - Objectives: Prep the X-Jet.
               Explore the X-Mansion.
               Meet in the War Room.

    When the level starts Cyclops is right next to you. Next talk to Gambit who
is outside the Danger Room. In the Medical Room talk to Jean about the 
Professor's current condition. In the Dining Room a sketch book can be found. 
Go in to the X-Jet hangar to talk with Wolverine and Beast. In the far left 
corner in the X-Jet hangar is a Danger Room disc. When ready do the War Room
computer to select the next, and final, mission.