Find Fawful!
Go to the blinking section inside his body, and find toadsworth and stimulate Bowser's body so he can slam the ground.
Bowser must go down the underground area of his castle. You'll sooner find the bob-ombs.
With Bowser, you can take a Chakron to the Mushroom Kingdom. (But you have to find the Chakron in the Mushroom Kingdom first) Or you can walk. For Mario and Luigi, you can take the pink pipe from inside Bowser. Or if your outside Bowser, you can walk. Hope I helped! :)
You can get out of Bowser's body when Bowser gets shocked by the security system in the Toad Town Caves.
Bowser can't jump.
just follow the story then after he fights bowser castle the part after that then mario and luigi find him attacked with a lazer.
Mario and Luigi goes to Bowser's Castle
in the flashing area
we don't know figure it out yourself
For Bowser: Broggy Bunker For Mario and Luigi: Falling Star
probably because somewhere deep down inside bowser he feels unworthy of mario's lover. mario would come and some how find a way to defeat bowser because bowser is really pathetic when it comes to setting up a foolproof trap for mario.