Why is Izzy Moonbrow Having a Tennis Ball on Her Horn a Thing?

[Shigaraki 290]

its called balancing. The end.

[Evil Pink One 13,512]

I hope the new nightmare moon is flurry heart.

[Sonic Shimmer 4,133]

For the same reason ponies in socks, Twilicane, ponies sliding into boxes, wet mane ponies, Fluttertree, Flutterbee, Scootachicken, marshmallow Rarity, Pancake Sparkle, Trollestia, gaming Luna, Cadence throwing, Sweetie Bot, Dictionary Belle, Colgate the dentist, anthropologist Lyra, Vinyl’s bass cannon, Bacon Hair and Flash the waifu stealer were a thing.

For teh lulz.

[Totally Nyx 36,167]

My theory is that she's actually a shapeshifting tennis ball and that she tried to hold a pony form too long. She's starting to revert back to her tennis ball form and is trying to play it off so no one will know.

...

Or maybe she's practicing to join a traveling circus she saw last week. Don't worry, she'll be over it by this time next week.

[AchievementPony 13]

well obviously, because she likes tennis