Timmy spawns in the courtyard outside the Scarlet Bastion in Stratholme after you kill all the Scarlet Crusade NPCs in front of the entrance. He spawns immediately after the last death, and appears from the far left of the courtyard, so be careful not to add him and stay in the middle of the courtyard when fighting the Scarlet Crusade.
Tactically speaking, he is a simple tank and spank fight; however for anyone below probably level 65, the word "tank," here needs to be strongly emphasised, because for the level, he hits very hard.
- "TIMMY!" - Yelled by Timmy the Cruel when he spawns in Stratholme. This is a reference to the character Timmy from South Park.
Little Timmy speculation
In Warcraft III there is a ghoul named Timmy. They could be the same. Some speculate that the Timmy-ghoul was in fact Little Timmy, though Timmy can be seen in Warcraft III later in Undead campaign selling Ice Shards, and later on Theramore.