Hi, I don't post much, but I felt like trying these ones, and discovered that the tricks I want to pull have not yet been posted here.
Rolling Thunder
00A0:?? - infinite shots
0059:?? - infinite time (must turn off at the end of the level)
05BC:09 - infinite lives
0089:02 - You can repeatedly bump into enemies without losing health (unfortunately, the auto-kills still kill you)
00A1:?? - infinite machine gun bullets (must turn off to fight Geldra)
?? can represent any number
G.I.Joe
00D8:159 (FCEU) - everything passes right through you
064F:?? - health meter for any vehicle
0656:?? - maximum meter for your vehicle health meter
00D6:XX - choose your character (glitchy, and you can't see all your power-ups)
XX:
00 - Duke
01 - Blizzard
02 - Snake-Eyes
03 - Grid-Iron
04 - Rock and Roll
05 - Hawk
06 - Pogo (can't finish game)
07 - Lizard (just an ordinary lizard without any capabilities)
08 - Copter
09 - Buzz Boar (can't finish game)
048F:255 - very limited amount of enemies and power-ups, can't finish certain levels when activated
Rolling Thunder
00A0:?? - infinite shots
0059:?? - infinite time (must turn off at the end of the level)
05BC:09 - infinite lives
0089:02 - You can repeatedly bump into enemies without losing health (unfortunately, the auto-kills still kill you)
00A1:?? - infinite machine gun bullets (must turn off to fight Geldra)
?? can represent any number
G.I.Joe
00D8:159 (FCEU) - everything passes right through you
064F:?? - health meter for any vehicle
0656:?? - maximum meter for your vehicle health meter
00D6:XX - choose your character (glitchy, and you can't see all your power-ups)
XX:
00 - Duke
01 - Blizzard
02 - Snake-Eyes
03 - Grid-Iron
04 - Rock and Roll
05 - Hawk
06 - Pogo (can't finish game)
07 - Lizard (just an ordinary lizard without any capabilities)
08 - Copter
09 - Buzz Boar (can't finish game)
048F:255 - very limited amount of enemies and power-ups, can't finish certain levels when activated