Content used for https://www.youtube.com/playlist?list=PL006xsVEsbKjSKBmLu1clo85yLrwjY67X
IMPORTANT: As of Episode 17 of Reconstructing CaveStory we switch to using the media from the original freeware version. https://www.youtube.com/watch?v=RqAPmJuSMgk&list=PL006xsVEsbKjSKBmLu1clo85yLrwjY67X&index=19
You can get the Sprites (.pbm files) from there.