The following are known CTRPF AR Cheat Codes for Super Mario Bros.: The Lost Levels on Nintendo 3DS (3DS).

0004000000094E00.txt

[99 Coins]
2885E84E 00000063

[Invincible]
2885E88F 000000FF

[Infinite Lives]
2885E84A 00000008

[Push R Rest Time to 990]
DD000000 00000100
2885E8DC 00000009
2885E8DD 00000009
D2000000 00000000

[Always Fire Power Mario]
2885E844 00000000
2885E846 00000002