Mario & Luigi 1: Peach's voice is stolen. Then you learn it wasn't. Then Peach is kidnapped by a witch and Fawful. Then she's saved.
You forgot that the witch posessed Bowser then tried to destroy the Bean Bean Kingdom with a flying castle. Mario and Luigi invaded the castle and killed the witch's spirit, freeing Bowser from the witch's posessing and saving the kingdom.
Go Weegee! I don't know why, but I can't get the word "bob-omb" out of my head >_<