Mario's Time Machine (NES)/Walkthrough

Story
The story goes that Mario has found out that Bowser has been using a time machine, called the Timulator (which looks like a microwave with a warp-pipe sticking out), to go back in time and steal historical artifacts. He then wants to put them all into his personal museum and destroy the Timulator when he is finished. Mario knows he must again stop him and change history back to the way it originally was.

At the start of the game there a little cutscene where Mario and Yoshi go to Bowser's Museum and are about to go inside Yoshi decides to throw Mario off his back and runs into the museum by himself. Bowser appears at the entrance and tells Mario he has captured Yoshi. Now Mario must return all the artifacts to there proper places in time and rescue his buddy.

Stages
There are 14 stages throughout 7 doors in the museum. There is a final eighth door that is only accessible when all the artifacts are returned to their proper time period. This last door contains a boss battle with Bowser, Yoshi's freedom and eventually the end of the game.