Please send me a PM if I'm missing anyone. It's harder to keep track now that there are 2 threads for discussions.
Currently the error occured for 19 gbatemp users:
shamzie
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 4.5
EmuNAND: 9.4
used header: CTR-P-AGGE, CTR-P-BALE
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire
Makavelim4
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.5
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon
ShawnTRods
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: private
SysNAND: 6.2 (JP), 4.1 (EU)
EmuNAND: 9.5
used header: no public header was used
eShop/Miiverse blocked: error already fixed
other games blocked: error already fixed
played games: Pokémon, Animal Crossing: New Leaf, Mario Kart 7
--> Error disappeared after resetting the internet settings.
M.Z.
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: ?
EmuNAND: 9.4
used header: ?
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire
Grumbled
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.5
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire, Super Smash Bros. for Nintendo 3DS
Dayfid
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.5
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Fantasy Life, Super Smash Bros. for Nintendo 3DS, Pokémon Omega Ruby/Alpha Sapphire, Mario Kart 7
medegen
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.5
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire
angelc54
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 9.2
EmuNAND: 9.5
used header: ?
eShop/Miiverse blocked: no
other games blocked: yes
played games: Super Smash Bros. for Nintendo 3DS, Pokémon
FreddyBeckett
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: ?
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire, Super Smash Bros. for Nintendo 3DS, Bravely Default, Tomodachi Life
Nirmonculus' friend
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: ?
EmuNAND: 9.5
used header: ?
eShop/Miiverse blocked: no
other games blocked: yes
played games: Mario Kart 7, Pokémon Omega Ruby/Alpha Sapphire
RahXen Legacy
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 4.4
EmuNAND: 9.5
used header:
eShop/Miiverse blocked: no
other games blocked: yes
played games: Super Smash Bros. for Nintendo 3DS, Pokémon Omega Ruby/Alpha Sapphire, Bravely Default, Mario Kart 7, Dead or Alive: Dimensions
JmJCom
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.4
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Fantasy Life, Bravely Default
pdensco
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 4.1
EmuNAND: 9.5
used header: obtained from the web (doesn't remember)
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire
SuperSVGA
Flashcard: Gateway 3DS
game type: CIA
header type: none
SysNAND: 4.5
EmuNAND: 9.5
used header: none
eShop/Miiverse blocked: no
other games blocked: yes
played games: The Legend of Zelda: Ocarina of Time 3D (CIA), Pokémon Omega Ruby/Alpha Sapphire (CIA), The Legend of Zelda: A Link Between Worlds (3DS ROM, headerless)
--> Other EmuNANDs still work online on the same console, so it's likely to be a different error. We are waiting for more information from SuperSVGA.
sALMAn84
Flashcard: MT-Card
game type: 3DZ ROM
header type: public
SysNAND: 4.2
EmuNAND: 9.4
used header: CTR-P-EK2A (Sky3DS default header)
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon X/Y
zannalabianca
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 4.2
EmuNAND: 9.5
used header: Metal Gear Solid - Snake Eater 3D
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon X/Y, Super Smash Bros. for Nintendo 3DS, Fantasy Life
roxas855tw
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: 9.5
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: Pokémon Omega Ruby/Alpha Sapphire
--> After playing a retail copy of Pokémon Alpha Sapphire and downloading special Pokémons the error disappeared. It most likely wasn't a ban.
pnkrd0
Flashcard: Gateway 3DS
game type: 3DZ ROM
header type: public
SysNAND: 4.5
EmuNAND: 9.5
used header: prepatched
eShop/Miiverse blocked: no
other games blocked: yes
played games: Monster Hunter 4 Ultimate
DecapitatedHorse
Flashcard: Sky3DS
game type: 3DS ROM
header type: public
SysNAND: ?
EmuNAND: none
used header: unmodified Sky3DS template file
eShop/Miiverse blocked: no
other games blocked: yes
played games: ?
About that Spanish MK7 incident: Maybe he played at the same time his sister played? Then it's no longer private but shared.