Can you specify couple things such as:
1. Which game they will be put in.
2. What size the image should be.
3. How many frames they should have at least.
4. What role they will have in the game.
just to name a few.
Viewing post in I Need OCS To Put My Game
it can just be a still frame and it will either be in the story mode or just a skin in the arcade mode, SpearMint Stack by Spear games (itch.io)