Help I need to access bank to transfer my Pokémon error 005 5602

[fossil narwhal]

I don't know how to fix it but a bird told me to join this server and people here would help

[outer jackal]

Is your console region changed?

[fossil narwhal]

i think because it has shop the old shell says it's Japan and I downloaded bank from shop. How can I check if its changed?

[outer jackal]

Yeah its region changed

Region change back to japan

[fossil narwhal]

How can I do this

I bought it like this

[outer jackal]

https://3ds.hacks.guide/region-changing.html

[fossil narwhal]

Thanks