- Unconverted (UC) pets are a handful of grandfathered pets who retained old artwork after the site-wide conversion in 2007. These pets cannot be created by users, change colors or species and can only wear certain types of wearable items.
- As of January 2024, unconverted pets have gone through some significant changes and that older, nostalgic art will now be available to users through NC Styles that can be purchased at the Styling Studio in the NC Mall.