This page documents the binary layout of sprite files found in the Banjo-Kazooie ROM (Nintendo 64). These files contain image data composed of one or more frames, each composed of a series of image chunks.

All multi-byte values are stored in big endian. Unless otherwise stated, all examples use sprite ID `06EB`.

A sprite file is divided into the following sections:

• Header (0x00–0x10)
• Frame Offset Table (0x10–...)
• Frame Data

The header occupies the first 0x10 bytes of the file and contains basic metadata about the sprite.

Immediately following the header is the frame offset table. This table contains 32-bit pointers to each frame's data section, relative to the start of the offset table.

For a file with 1 frame:

Total size of this section = `4 × frame_count`

Each frame starts with a 12-byte header.

Following the frame header, chunk data begins at offset `0x24`.

• The format ID `0x0100` appears to be standard for most (if not all) sprite files.
• Chunk data is not yet fully documented, but it follows immediately after the frame header.
• Width and height fields may override the default width/height stored in the main header.

This format is still under investigation. If you have additional samples or insights, please contribute.