Any time I name a new Magikarp in Magikarp Jump, a screen briefly pops with "Now Transmitting" before I can continue playing.
As an experiment, I tried turning off my cellular data. When I went to rename my Magikarp, I was shown an error telling me to "Please check your connection and try again a little later."
Why do I need an internet connection to rename my Magikarp? Where is my Magikarp's nickname being sent?