i take no credit for the guide here is where it comes from http://www.cheatcc.com/pc/sg/lego_batman_2_dc_super_her....txt
Super Hero at 95,000
Characters: Batman, Robin
Batmobile Chase -
This part is similar to the Batwing chase of earlier. Blast the Juggernaut,
then take down any mooks that show up to tangle with you. The only thing
about this one is that the target on the Juggernaut keeps changing, usually
a different type of gun pops out and you have to target it, not just the
Inside the Juggernaut -
Having worn down the Juggernaut's defenses, the dynamic duo infiltrate it.
Punch out the scientists and the machines churning out LexBots, then bash
the glowing boxes in the back right and assemble the Magnet Suit. Use the
magnet on the tank to the right, and then on the ball that drops beneath it.
Guide the ball through the trough to the left, and when you pull it up, it
will unlock a blue wall on the back. Walk up it, then head right and turn the
valve to drop down a ladder for Batman.
Head to the right and magnet down some pieces for a Sensor Suit, then use
it to bypass the camera and go up the ladder. Smash the blue gear to kill
the camera. Next, head to the right and use the magnet to close the vents.
Smash the blue brackets to bring up a green wall for the X-Ray vision. Use
it to move the two right-hand gears in place, and turn the left one to close
the other vent.
Two Mini-VTOLs will pop up from behind. Batarang the both of them and
assemble the pieces into a Bat Suit. Use Robin on the magnet to the right
to raise the ramp, then leap off and glide to the right. Smash the blue
spinning gears, then sonic the glass to the right and magnet the dish that
pops up. Assemble the pieces into an uplink which will call in the Batwing
for some assistance in tearing the thing up.
Drop down to the burned out hole and enter. Use the magnet to open the door
to the left. In this large generator room, head to the left and flip the
switch on this level. This brings out a green... thing. Smash it and one
of the power conduits will go away. Next, walk up the blue wall and magnet
another green thing out of the wall to smash. Lastly, use Batman to grab
onto the Grapple Handle above and hop off to the right. Sonic the glass away
and throw the switch to uncover the last green thing to smash.