Silver Surfer

Level select:
Press B, A, Left, Right, B, A, Start at the title screen.

Invincibility:
Press Up on controllers one and two. Enter KJTTJK as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Full weapons:
Press Up on controllers one and two. Enter CKWJT4 as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Two extra continues:
Press Up on controllers one and two. Enter J8SCL9 as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Unlimited continues:
Press Up on controllers one and two. Enter SJM333 as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Second quest:
Press Up on controllers one and two. Enter KCHDR4 as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Third quest:
Press Up on controllers one and two. Enter S4FHFB as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Possessor 1:
Press Up on controllers one and two. Enter FPNFR7 as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Possessor 2:
Press Up on controllers one and two. Enter 9KY3FG as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.

Level skip:
Press Up on controllers one and two. Enter GDXK4F as a password. Alternatively, press Up + A + B on controllers one and two to display the password screen.