Gradius 1

Infinite lives player 1:
 800C20A2 000A

Infinite lives player 2:
 800C20A4 000A

Always 4 options:
 800AAC3C 0001
 800AACB4 0001
 800AAD2C 0001
 800AADA4 0001
 800C1FF8 0004
800C2134 0001
800C2136 0002
800C2138 0003
800C213A 0004

Always have missiles:
 800AABE8 0001
 800AAC50 0001
 800AACC8 0001
 800AAD40 0001
 800AADB8 0001

Invincible:
 8002FBE6 1000

Gradius 2

Infinite lives player 1&2:
 D0091238 0000
 8009DE70 0606

Invincible:
 80037202 1000
 8003725C 0000