The Cartwheelin’ emote is an Rare Fortnite emote. Cartwheelin’ was available via the Item Shop for 500 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Cartwheelin’ Skin Details
Head over heels.
Fortnite Cartwheelin’ Skin PNG Images
Here is the PNG images of Cartwheelin' below!