Floweytale is an AU created by YouTuber Ghost3123, in this AU, Flowey stole the soul of Chara and is now on a soul harvest, he will also take Frisk's SOUL and trap her in it, leaving Frisk's friends to work together to get her back.
Flowey can also teleport to AUs through his burrowing ability, although he usually stays within his own AU.
Currently, 2 episodes exist and the creator is in the process of creating Episode 3, in the first episode, which is kind of more of a trailer, the animation lasts 10-12 seconds and all that is shown is Chara entering the room with Flowey, only to lose her SOUL.
Episode 2 is nearly 3 minutes long, and it also features Frisk and Undyne being trapped within the magical pocket dimension that you enter should Flowey steal your SOUL.
It is planned that Flowey will reach 15 SOULs, 1 less than the 16 needed to destroy the Underground. The name for this planned variant of Omega Flowey is currently "Determination Flowey", although it will probably be changed in the future. Determination Flowey is a red, black, and brown version of Omega Flowey with many tentacles along the arms and petals, as well as the SOUL tubes. The eyes will be in black and red and the TV screen displays a face that appears to be that of an Amalgamate.
Link to channel hosting the series: https://www.youtube.com/channel/UCM60tyV64CTmvSUZnvj_USA.