Pixel Art Battle Sprite Sheet

Create a 512x512 pixel art sprite sheet featuring a 2-3 head tall character in a 4x4 grid layout. Each frame should be 128x128 pixels. The character must be facing right and maintain consistent scale and design across all frames. Arrange the animations as follows: Row 1: Idle 1, Idle 2, Walk 1, Walk 2. Row 2: Jump 1, Jump 2, Punch Prep, Punch Extend. Row 3: Crouch 1, Crouch 2, Retreat 1, Retreat 2. Row 4: Guard 1, Guard 2, Kick Prep, Kick Extend. Use a clear 8-bit pixel art style with no anti-aliasing. Ensure no grid lines, labels, or background patterns are included.