You find the Magikoopas in Peach's Castle, at the point where you find three doors with Fawfulcopters which hold the keys. Break down the Fawfulcopter with the red key, and you will find the Magikoopas. You will get the SP attack, Magikoopa Mob.
You can get Beans, and an SP: Magic Window.
You can only do it with Mario and Luigi. For Mario, press A. For Luigi, press B.
no
not really
noone
You have to complete the pumpworks level
There are only 2 files in Mario and Luigi Bowser's Inside Story.
you have to hit the shell block.
on the map
By defeating him in battle.
647896478263486464682643736
by eating lots of shrooms