Stinger
Books: Nintendo Games Secrets - The Best of How to Win at Nintendo Games
GZNGNLSP Keep weapons after death
PAXKPGLA Start with 1 life
TAXKPGLA Start with 6 lives
PAXKPGLE Start with 9 lives
OZVKKLVS Infinite lives
YGNGAKTL + PAVKTGAP Start with Dual Cannons
YGNGAKTL + ZAVKTGAP Start with Laser
YGNGAKTL + GAVKTGAP Start with Shoot Right
YGNGAKTL + AAVKTGAO Start with Shoot Left
YGNGAKTL + APVKTGAP Start with Five Direction Firing
YGNGAKTL + AZVKTGAP Start with Three Direction Firing
YGNGAKTL + AGVKTGAP Start with Force field
For the last five codes, you must wait for the "demonstration game"
to start by itself before pressing "Start. The display will read "Stage 1,"
but each code does warp you to the correct stage
GZOGIGSA + PAEGPLPA Start at stage 2
GZOGIGSA + ZAEGPLPA Start at stage 3
GZOGIGSA + LAEGPLPA Start at stage 4
GZOGIGSA + GAEGPLPA Start at stage 5
GZOGIGSA + IAEGPLPA Start at stage 6