The following are known CTRPF AR Cheat Codes for Mega Man IV on Nintendo 3DS (3DS).

00040000000EF800.txt

[Invincibility]
D3000000 08000000
20806156 00000000
D2000000 00000000

[Hit Anywhere]
D3000000 08000000
208011DC 00000011
208011DB 00000018
D2000000 00000000

[One Hit Kills]
D3000000 08000000
20802A74 00000000
D2000000 00000000

[Jump in Midair]
D3000000 08000000
20806425 000000FA
20806426 00000041
20806428 000000E6
20806429 00000001
2080642C 00000000
20806609 0000001C
2080660A 00000018
D2000000 00000000