I made these back in 2015 (when I still had hair!) I wanted to demonstrate that I could animate traditionally, as well as imitate 8-bit and 16-bit graphics, and ended up using different methods for each. From left to right:

• The 8-bit sprite fits within 16×24 pixels, allowing him to fit in with most NES player sprites. I limited the color palette to 4 colors (including transparency), and only used three unique frames of animation.
• The 16-bit sprite was drawn and shaded in Flash, without using outlines. Each color was exported separately, brought into Photoshop, and dithered down to a few colors, limiting the color palette to 8 colors (including transparency.) There are 7 frames, and the sprite fits within 32x64px.
• The Flash animation uses 12 frames and follows no specific limitations.