I've received permission from Kay Yu to allow the use of HoloCure assets within games created as part of this jam! Originally, I was going to try to pull them all out and post them here, but I ran out of time so I'm going to walk through how you can get at them as it's not difficult.
NOTE: Just a reminder that any game created using HoloCure assets CANNOT be given a price on itch.io, per Kay Yu's request.
1. Download the stable release of the Undertale Mod Tool:
https://github.com/UnderminersTeam/UndertaleModTool
2. Locate the HoloCure install folder (this is typically in [Steam path]/steamapps/common/Holocure).
3. Open the Undertale Mod Tool and use it to open the data.win file from within the HoloCure install folder.
4. Dismiss the warning about the game being compiled with the YoYo compiler
5. Open the Sprites folder on the left. Within the Sprites section, you'll find all the background, furniture assets, UI elements, and, of course, character sprites. Double click on one of these elements to view the details.

6. From here, click the "Export all frames" button to save the file to your machine as a .png file.
7. Most character sprites will have multiple states, so be sure to everything all that you may need for their animation cycles.
Good luck to you all! Feel free to ask questions either in a forum post here or in the KFP Discord channel for the game jam.
- Davkas
