Splatoon's success isn't just judged on unit sales, which are nevertheless impressive on the Wii U, but by its broader cultural impact. It's a new Nintendo IP that, it's safe to say, has struck a chord with the public and is likely to become a regular part of Nintendo's library in the future.
Along with a lot of merchandise there have been multiple Squid Sisters concerts in Japan, live events in which a band accompany large projections of the sisters performing. A European audience got to experience this recently with Nintendo organising a concert at the Japan Expo in Paris.
The concert (about 26 minutes long) has now been posted on YouTube. The event looks like it was a lot of fun, and the crowd certainly got into the spirit of it - take a look below.