Hello aseprite,
I have recently worked on an animated brush extension.
The extension permits to add and save animation and use it like a simple custom brush !
On other words, it let you create a brush that contains multiple frames and let you paint multiple frames at once. Some functionalities are available to change the different colors from the animated brush, flip, export or import animated brushes, … .
You can download the extension on Aseprite Animated Brush Extension by Fabico or Github.
More information are also available on those pages.
A quick demo is available on https://www.youtube.com/watch?v=eXfhMy3lm04 , not all features were present at the moment the video was made.
Thanks and have fun pixeling !