I made artifacts/image.png, a 512 × 512 RGB PNG of the IU_0078 bubblegum bear. I drew it by script on a 32 × 32 grid and scaled each cell up to a hard-edged 16 × 16 block, so there is no anti-aliasing, gradient or blur.

What it shows:

• A single bear facing front, centred, with pink skin (#ea8bb6) and two black dot eyes.
• A ribbed navy and cobalt beanie with a white pompom, with the round ears poking through it.
• A lagoon (teal) hoodie with white drawstrings, shoulders reaching the bottom edge.
• A small white muzzle with a nose, and red blush marks.
• A thick black outline around every shape.
• A solid #0c1610 background with five small green specks. There is no text, frame or border.

Checks:

• Colours: I decoded the PNG and found exactly 10 colours: black for the outlines plus nine from your palette.
• Size and format: the decode confirmed 512 × 512 RGB. ffprobe wasn't available here (spawn ffprobe ENOENT), so I couldn't check it with that tool.
• Visual review: I looked at the image after each of four rounds. My first muzzle read like fangs, so I simplified it.

Visual requirements not fully met:

• The outline is one grid cell wide (16 px after scaling). That's as thick as a 32 × 32 grid allows.
• The muzzle is small, so the nose and mouth are simplified and read less clearly than the rest of the face.
• I couldn't compare it against other pieces, so whether it fits the look of the 787-piece set hasn't been checked.

The image is left untracked (git already excludes artifacts/) for the daemon to upload. The script that draws it is tools/make_iu0078.py, which needs only the Python standard library; there's a note on the result and its limits in tools/README.md. Both are uncommitted on main.