In the newer Animal Crossing v 1.1 the previous code doesn't work but with a little modification I've narrowed it down to use slots 3-14. Since mushroom mural is already included in the ARDS inventory slot 1 and slot 2 as is Block flooring. So this way you can load all 14 mario theme at once...
-------------------------
slot 3 brick block - 121d8e82 00004b68
slot 4 coin - 121d8e84 00004b6c
slot 5 flagpole - 121d8e86 00004b70
slot 6 super mushroom - 121d8e88 00004b78
slot 7 green pipe - 121d8e8a 00004b7c
slot 8 ? block - 121d8e8c 00004b80
slot 9 koopa shell - 121d8e8e 00004b84
slot 10 cannon - 121d8e90 00004b8c
slot 11 1-Up mushroom - 121d8e92 00004b90
slot 12 fire bar - 121d8e94 00004b94
slot 13 fire flower - 121d8e96 00004b74
slot 14 starman - 121d8e98 00004b88
-------------------------
Other:
slot 1 pikmin - 121d8e7e 00004b98
slot 2 blue falcon - 121d8e80 00004b9c
**Warning don't load mushroom mural and/or block flooring with the ARDS presets if you're loading a pikmin or blue falcon in slot 1 or 2 respectively as they'll conflict**
Enjoy.