LittleBigPlanet 2 Walkkthrough - Chapter 5: Invasion of the Body Invaders
3Full Walkthrough: http://www.gamefront.com/little-big-planet-2-walkthrough/
Collect all of the prize bubbles near the start by ramming them into a wall. When you've got all four, continue up the path and hold "R1″ to grab a white blood cell.
Take the blood cell up and release "R1″ to throw it into one of the purple walls blocking your path.
Continue heading up and eventuall you'll reach a spot guarded by two enemies blockading two paths. Kill the enemy to the left first with repeated shots from the white blood cell to free up several prize bubbles. Then kill the enemy to the right to continue up the path.
Keep on moving forward past the automatic purple gates and you'll reach the true boss of this world.
The purple light that the boss shines shows the direction he is headed. Fire the white blood cell just ahead of where the boss is traveling so he runs into it and takes maximum damage.
When the boss's light turns red, he's going to chase you. Don't worry about hitting it and just focus on evading until the light turns purple again.
The boss will eventually split into two, three and then four parts, but the strategy still remains the same. If you wait until they converge at the center, you can hit them all at once.
Full Walkthrough: http://www.gamefront.com/little-big-planet-2-walkthrough/