What is a Deco Shop in Pokemon Emerald?

DECO and MOD shop is the SAME to each other and it's about buying or selling items in a person that can you talk in POKEMON EMERALD

these are codes that can be use:

Master Code

9266FA6C97BD
905B5ED35F81
B76A68E5FAB1

Access MOD/DECO shop

AE44960E2DD6
99468975ECD8
AE44960E2DD6
FF62825EBC40
AE44960E2DD6
805C1D31C295
30BA206B961F
79C4A3076CDE
79BA7465DC00

You can support me by adding or subscribe me in facebook this is the address:

https://www.facebook.com/anthonygarcia.tagamtam?ref=tn_tnmn

and this is my email:

tagamtam.anthonygarcia@yahoo.com

Anyway my Name is Anthony Garcia Tagamtam

Hope you Enjoy