Super The Empire Strikes Back

All Force powers:
Quickly press X, B(2), Y, X, A(2) at the title screen.
A sound will confirm correct code entry.
Press Start before demonstration mode begins.
Press Select during game play to access the powers of The Force.

Skip to last level:
Quickly press A, X, B, A, Y, X, B, A(2), X, B(2), Y, X at the title screen before demonstration mode begins.

Ninety-nine lives:
Press X, Y, B(3), X, A, Y(2), B, A, X, Y at the game selection screen.
Darth Vader will say "impressive" to confirm correct code entry.
Press Start before demonstration mode begins.

Seven continues:
Quickly press X, Y, A, B, X(2) at the title screen.
A sound will confirm correct code entry.

Unlimited thermal detonators:
Press A, X, B, X(2), A, Y when the game selection screen initially appears.
Darth Vader will say "impressive" to confirm correct code entry.
Press Start before demonstration mode begins.

Debug mode:
Press A, B, Y, X, A, B, Y, X, A, B, A, B, Y, X(2), Y, A, B, Y, X when the main menu first appears.
Darth Vader will say "impressive" to confirm correct code entry.
Press Start the to begin a game with all Force powers and unlimited thermal detonators.
Press one of the following controller actions during game play for additional effects:

Display debug menu
Press L + R on controller two

Invincibility
Hold Select + A + B + Y + X on controller two.

Level skip
Press Start.

Sound test:
Hold A + B + X + Y (in order) during any side-scrolling level.
Hold those buttons and press Down, Start.
Repeat the code to play the next sound.

View high scores:
Press A(2), B(2) at the main menu.

View credits:
Press A, B, A, B, A, B, A, B at the game selection screen.

Control introduction sequence:
Press Y(4) when the main menu first appears.
Darth Vader will say "impressive" to confirm correct code entry.
Wait for the Star Wars logo to fade, then use the D-pad, L, and R to rotate and scroll the introduction text and Star Destroyer.

Easy    Brave   Jedi    Level
WDWDWB  TCCPSJ  FHPSMN  First cave
CSPTNP  SSFJND  CCTLFR  Outside cave
NSRSCL  NLBJJF  MDWNDF  Second cav e
WFBJTB  JRWNPL  THNTLR  Probe droid
BHRDHL  DGBDPL  LQYSCH  Hoth hangar bay
HMGPWJ  RCWJMF  GQTVDD  3D Snowspeeder
LDGLTJ  JRGRTD  PNFDHJ  Side scrolling snowspeeder
LLJFBG  MDBNMR  SCWWFZ  Inside AT-AT
WLJWDN  HDPPLL  LFHWWB  Han in Hoth base 1
WBWHRW  GTLCNP  RBHNFC  Han in Hoth base 2
NCCGSP  WWBGHF  KCDFZK  Millennium Falcon
GLTTDJ  PGBNBH  KCCVGJ  Dagobah
GJBHNF  TNPSPL  RBQRWS  Habogad
MCDGRJ  DLPMMD  QBTTXX  Han at Bespin
PGPNMG  SHRBLW  ZGLKDV  Ugnaught factory
NGMSJB  LNGPNN  VVDQXC  Carbonite chamber
RLMSWJ  FSFMSR  FGTTVV  Chewbacca vs. Boba Fett
MBRCGB  FCPDPC  YDHBQT  3D Fight at Cloud City
SWPMSS  HPLSHJ  TNHJSK  Luke vs. Darth Vader