Well it seems N may be detecting the SKY3ds card for online.
I have an Australian new 3DSXL on current firmware and Mario Golf World Tournament will not allow online play.
It comes up with a new error code that's not listed on N's support page and says something along the lines of online play is not supported on this game card. I will post the error code and details later when I get home.
So there is 2 possibilities I see here:
1. N is able to detect the card and blocking any online functunality
2. There is a specific Australian release Mario Golf and even an original Euro game wouldn't work online in an Australian 3ds.
I have heard nothing back from Sky in regards to this issue.
If someone has the ability to make a rom from a known Australian original I could test it.
i say open Disk Writer V1.05 delete game you have burn before Mario Tennis Open or format it again
copy the code to notepad and save as whatever .txt burn it with Disk Writer V1.05 option change template pick the .txt you just save drag and drop the game in to the Disk Writer V1.05
burn it yes
http://filetrip.net/dl?omo4fYauJG
i patch my own online header
it should work let me no if it work or not
Mario Golf World Tour Europe ver online patch
** : CTR-P-AJ3P
SHA1: 3A08F323179FCB5BD157B37795060A0DAC00697E
00 00 00 00 C2 FA 02 90 C2 22 13 00 6A E4 95 1B
43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
3B 8C 17 63 27 64 7A DA 9C 09 D7 8A 14 49 6F 76
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C7 4F 45 F4 C2 D6 08 4F CA 96 07 59 E0 02 85 A4
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 4A 33 50 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 EC
Mario Tennis Open Europe ver online patch
** : CTR-P-AGAP
SHA1: 7C509EEB6CC7B421E31255BD0617206CC4980C06
00 00 00 00 C2 F8 00 90 C2 22 13 00 76 B9 89 46
43 54 52 49 4D 41 47 45 00 00 00 00 00 00 00 00
AB 60 B5 EF FB C4 67 A8 C4 45 47 F6 A9 5E ED 19
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C7 4F 45 F4 C2 D6 08 4F CA 96 07 59 E0 02 85 A4
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 41 50 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 9A 58