List of Mario & Luigi: Bowser's Inside Story pre-release and unused content

These are beta elements from Mario & Luigi: Bowser's Inside Story.

Beta Elements
In the ROM, various unused sound files can be found. These include Yoshi's voice clips from Yoshi's Story, and some of the music from Mario & Luigi Partners in Time. The PiT music won't play correctly, although the Yoshi voices will.

In some trailers, after Mario saves Peach from flames at the start of the game, Bowser said "How dare you?", but in the final release he says "Crud!"

In the Japanese ROM can be found a unused item that looks similar to a Life Shroom but is named Dummy: if used, Mario (or Luigi) will throw it in the air (while inside Bowser) and it will explode, healing 60 HP back to Bowser. It was most likely scrapped because of the fact only the Sea Pipe Statue can damage Bowser from inside.

All the enemies that the Mario bros. can't fight still have an attack pattern for them (except the Dark Mechawfuls, as it was unfinished, and the final boss).