Because of the screenshots for the G5 movie we’re revealed on Twitter, there so been so much fan art of Izzy with the tennis ball stuck on her horn. Everyone is coming up with reasons as of why she has a tennis ball stuck on her horn, here’s mine.
Since we are so far in the future now and friendship and even magic are no more, I don’t think unicorns use their magic for everyday purposes now. So it would make sense if Izzy doesn’t know how to take the tennis ball off her horn.

Oh Izzy… you naive little dum dum. We still love you! :3

<3