Use tools like Aseprite or the engine's built-in sprite editor to "slice" the sheet into individual frames. Set Up Animation Cycles: Define your animations: Idle: 1-5 frames Run: 8-12 frames Jump: 4-6 frames Spindash: 3-5 frames

Limit your colors. Classic Sega Genesis sprites used a shared system palette, keeping Sonic to roughly 4 shades of blue, 3 skin tones, 2 shoe colors, white, and black.

Stick to the original 16-bit color palettes (e.g., shades of blue, white, and skin tone) to keep the "Classic" feel.

Define a collision box that fits the shape of the sprite in every frame, not just a static rectangle, to ensure precise collision detection. 4. Customizing and Creating Your Own Sprites (ModGen)

The Sonic community is incredibly active in "ripping" (extracting) sprites from official games and creating custom ones. The Pixelatedtale

Refined the sprite, making Sonic sleeker and adding the famous "Super Sonic" transformation sheet.