Platform: PC
ISP: Tefefónica de España (TdE)
Type of Internet Connection: ADSL
Internet Connection Speed: 10Mb/s
Date & Time: Jan. 2, 2012 20:31 CET
Frequency: Always
Character Name: Umo Heima
Race: Highlander
World: Gysahl
Class/Level: Archer/41
Area and Coordinates: North Shroud > Emerald Moss (23, 15)
Party or Solo: Solo
NPC Name: N/A
Monster Name: Anole Stalker
In-Game Time: 1:06
Steps:

1. Got to detailed Area and Coordinates.
2. There's a level 40 Anole Stalker standing still. It's name is purple. You can't attack it nor getting attacked by it.

On a side note, I've seen it a few times before on different hours and days though I couldn't report it.