Where can I get that theme?
I didn't know it was official, thanks!It's an official theme called "Splatoon: Squid Sisters", i got mine from the my nintendo reward system and downloaded from the theme shop. I don't think theme plaza (site people share custom themes) allows hosting official themes though so you will have to search somewhere else.
Why don't you try playing some of them?I have an old 3ds homebrewed and filled with games I'm looking for any good ones