Sky3ds go to eshop or playing games online

If I want to go to eshop and playing game online, is it possible if use the Sky3ds?
In some cases that Sky3ds new gamers found error "002-0123" when go to eshop or playing online games, let's the screenshot like this:

Actually this error just like the Gateway issue. It's the ROM that does not contain a header leading to failure of online gaming. By addeding a private header to the game ROM we will solve the problem and playing games online.
We all know the Sky3ds template, Sky3ds Team always keep updaing their newest version for the new games rom. It is this template that we need add the header to before writing/flashing game roms to Sky3ds micro sd card, there is no need to find a 3DZ game ROM.

Simple tutorial for how to modify template for eshop/online gaming?
1. Load the template and ROM.
2. Type in your Unique ID from your header dump.
3. Select the same options as in the base template, there is a chart where they can be found in the SAK thread in GBATemp.
4. Save, write and cycle.

Note: If that fails, you should repeat the steps and change just the manufacturer. Do not just punch in Cart/EEPROM ID's from your header dump - they will be incorrect.


** : CTR-P-XXXX
SHA1: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
00 00 00 00 XX XX XX XX ---> editing chip id XX XX XX XX

Manufacturer
45 = SanDisk
AE = OKI Semiconductor
C2 = Macronix

Size
7F = 128mb
FF = 256mb
FE = 512mb
FA = 1gb
F8 = 2gb
F0 = 4gb

Unknown
00 =
02 =

Card Type
90 = card1
98 = card2

43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ---> editing header
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

for example

** : CTR-P-XXXX
SHA1: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
00 00 00 00 45 FA 00 90 ---> editing chip id XX XX XX XX
43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E2 43 83 37 E5 8A 70 F1 A5 42 7E 86 40 11 40 29 ---> editing header
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Tips:
1, Use the template you downloaded from Sky3ds official site or the resellers' site: http://www.3dstown.com/cms.php?id_cms=22
2, Drag and drop any .3ds game into this tools to identify the CTR-P-XXXX then open your template file.txt
3, Press Ctrl + F on your keyboard it will pop up a windows Find box search the CTR-P-XXXX then edit chip id & header pick any tools you will let to download and use ---> http://scene.releases.free.fr/index.php?page=tools 
CTR v1.6

Gateway ROM Patcher v1.0

Luigi's Mansion Dark Moon missing header ---> sky3ds template file

** : CTR-P-AGGE

SHA1: AE7CABC8D130CBD8663C6B8261B99305A3986F42
00 00 00 00 C2 F8 00 90 C2 22 13 00 78 C3 87 3C ---> just edit ---> C2 F8 00 90 to ---> 45 FA 00 90
43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
57 89 E6 18 6A 44 0A FC A1 71 62 A2 AC 27 A7 A6
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ---> just edit ---> FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF to ---> E2 43 83 37 E5 8A 70 F1 A5 42 7E 86 40 11 40 29
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
43 54 52 2D 50 2D 41 47 47 45 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 6A FC

Luigi's Mansion Dark Moon editing online header now you are good to go online no more Error Code 002-0123 when you go online

save your template then burn the game with the template you just save ---> open that template you just save then burn the game

it should be like this

** : CTR-P-AGGE

SHA1: AE7CABC8D130CBD8663C6B8261B99305A3986F42
00 00 00 00 45 FA 00 90 C2 22 13 00 78 C3 87 3C
43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
57 89 E6 18 6A 44 0A FC A1 71 62 A2 AC 27 A7 A6
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E2 43 83 37 E5 8A 70 F1 A5 42 7E 86 40 11 40 29
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
43 54 52 2D 50 2D 41 47 47 45 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 6A FC

Hope this would help, original source: How to edit online header template file