It gets better, though: Mario & Luigi spend most of the game exploring Bowser’s body in search of a way out, while Bowser stomps around the kingdom doing his usual “marauding merchant of death” thing. Bowser doesn’t appear to be aware of all the people inside his body now, so when (for example) M&L poke at a nerve on the bottom screen, Bowser freaks out on the top screen as if someone’s made a voodoo doll of him.

This was taken from a preview from 1up. Check out the link below for more detials.

Check HERE