How to retrieve all individual images from a sheet

[Phoenixg00se]

You have to use a graphics program like Photoshop or one of its free alternatives:

Medibang Paint for Pro
https://medibangpaint.com/en/pc/about/

Krita
https://krita.org/en/

PhotoFiltre 7
https://www.photofiltre-studio.com/pf7-en.htm

Also you need to have some sort of background, the absence of it is called transparency and a function you can activate within a graphics program.
You can also use the selection tool, mark the area with the sprites you want to copy and then copy & paste it on your template.

Thanks!!! This helped me also.