From Mario Fan Games Galaxy Wiki

Pending was a temporary user group in which users are unable to post; though they are not banned per se, this has the same effect. Moderators review the member's behavior during this time, in which they decide whether said member will become part of the forum or will be Rejected.

This was later removed when the phpBB forums were launched.

MFGG Forum Member Groups
Forum Staff
Main Site Staff
Discord Staff
Other Roles