Be cautious when downloading .zip archives with this name from unofficial sources. Due to their popularity, these files are sometimes used as "wrappers" for malware or Trojans in file-sharing communities.

Typical contents within a Goutouren archive from this era include:

: Customized versions of popular characters designed for use in the MikuMikuDance software.

: High-fidelity animations often featuring intricate lighting and physics.