Batpaint. Among other ponies.
Get some speedpaint below!
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【 MLP Speedpaint 】- Pony Bat Halloween 🎃 Paint Tool SAI by Lovely pony
[2] Source
Super Pony [Speedpaint] by Margony
[3] Source
Celestia (SPEEDPaint) Light that never goes out by SweetlyNight
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