Aladdin
Contributed by-Richard

Level select:
On the option screen, using Controller 2, press L, R, Start, Select,
X, Y, A, B. Do this quickly - you'll hear a chime when it is done
correctly. On Controller 1, select "Exit" to return to the Title
screen. Then, using Controller 1, hold the L and R Buttons, and use
the Control Pad to choose your starting stage. 

Bonus lives:
Press B when the Genie blinks during the bonus levels for one or two
extra lives. 

PasswordLevel 
GMAS The Cave of Wonders 
JMPG  Escape from the Cave of Wonders 
GJAM  Inside the Genie's Lamp 
MAGP The Pyramid
PJSP   "A Whole New World" 
JPAJ    Jafar's  Palace
APMS  Final Battle

Key: 

A - Aladdin
P - Princess
G - Genie
M - Monkey
S - Sultan
J - Jafar