The Simpsons: Bart vs. The Space Mutants + Comic Book Guy's Quest

Differences Between The NES and GBC Versions

 * A new bonus mode has been added.
 * Pressing the B button on the title screen goes back to the game selection screen.
 * Due to the GBC's lower resolution, the text on the title screen saying "TM" and "MATT GROENING" is enlarged.
 * The copyright info was updated to ""BART VS. THE SPACE MUTANTS" COPYRIGHT 1991-1999 ACCLAIM REMAKE MADE BY TECHERUO LICENSED BY NINTENDO OF AMERICA" and "THE SIMPSONS TM AND COPYRIGHT 1991-1999 20TH CENTURY FOX TELEVISION ALL RIGHTS RESERVED"
 * The "Cool Man!" and "Eat My Shorts!" use different audio recordings.
 * More prank calls were added to the randomization.
 * The "Kwik-E-Mart" text is now green instead of black, to be more in-line with the show.
 * Nelson Muntz now wears red clothing instead of blue clothing, to be more accurate to his in-show depiction.
 * Some of the NPCs are changed to have more unique designs, rather than being recolors of Principal Skinner.
 * Sideshow Bob now wears red clothing instead of blue clothing, to be more accurate to his in-show depiction.
 * Itchy is now blue instead of black, to be more in line with his in-show depiction.
 * Along with that, Itchy is now redrawn to be more on-model.
 * The brown on Krusty's head sprite was changed to red, and his nose was changed from blue to red.
 * Lisa's sprite now has proper eyes instead of "bead eyes".
 * The "Bart on Mount Rushmore" ending cutscene now can be exited by pressing the "A" button, taking you back to the title screen for a hard mode.
 * Hard mode changes
 * The title screen now has the characters with Treehouse of Horror designs and bloody text saying "HARD VERSION".
 * You now only have 2 lives instead of 3.
 * The first level's timer is reduced from 600 to only 500 seconds.
 * The second level's timer is reduced from 700 to only 600 seconds.
 * The third level's timer is reduced from 400 to only 300 seconds.
 * The fourth level's timer is reduced from 300 to only 200 seconds.
 * Dying on the fourth level's timer only brings it to 400 seconds instead of 800 seconds.
 * The fifth level's timer is reduced from 900 to only 800 seconds.
 * The sound design is restricted to four channels instead of five.
 * The scoreboard is now more tiny and on the top of the screen due to the low resolution of the Game Boy Color.
 * Pressing "A+DOWN+UP+A+SELECT" on the title screen allows to access the carnival games, which you can play for an unlimited amount of time.
 * The code is given out at the end of hard mode.