The ghoul Lenny was a doctor before the war. He and his father, "Coffin" Willie, made it to the partial safety of Vault 12 in Bakersfield before the bombs fell, and were, like the rest of that vault, turned into ghouls by the intense radiation. When the Vault Dweller came to Necropolis in 2161, fixing the town's water pump, Lenny was greatly moved and inspired by his example. He wished that he had joined him, and spent the next 80 years regretting that he never had the courage to join him on his quest.
After the Master's super mutant forces assaulted Necropolis, Lenny fled, eventually arriving in Gecko. Here, upon the arrival of the Vault Dweller's descendant, the Chosen One, fate would have it that Lenny would be offered a second chance at undertaking a grand quest through the wastes.
When the Chosen One comes to Gecko, he can recruit Lenny to his party. He is of dubious value as a party member, though he is very durable, is at least capable (growing to be skilled) with pistols and SMGs, and is human-shaped enough to wear armor, in addition to being a skilled doctor. He has only 4 Strength, enough for a H&K P90c. Lenny remains at 7 AP through all his levels.
Given more strength by being equipped with power armor, enough to use a .223 pistol or even gauss pistol, Lenny can make an effective supporting member, especially if his Doctor skill is at a higher level than the Chosen's own. Care must be taken however, as Lenny usually enter in the middle of the line of sight in a fight to cure the Chosen One, even if told to wait at a location.
Had it not been enough being shunned by Vault City and generally, ghouls have this marked tendency to be mistaken for corpses while they are sleeping. Someone who rescued Woody in the Den from his dubious role as a sideshow exhibit: "Show..Me..The..Mummy!!" may consider doing a good turn for Lenny's father, also, and digging him out of his untimely resting place in Golgotha. Note that digging this one particular grave does not make the digger a Grave Digger.
The location of the grave is at the northwest (top left) corner of the southern (bottom) section. The grave is easily distinguished from others by looking at the grave mark; It says: "Here lies the dumbest son of a bitch to ever set foot to New Reno."
Little is received for this other than, potentially, satisfaction, and the chance to see Coffin Willie's comments as he lurches away, muttering to himself. Clicking on him makes him spout them randomly. Unlike Vic's daughter, Willie has nothing to say to his son.
If the Chosen One joins the Slaver's Guild in the Den while Lenny is in company, Lenny will express disgust at the Chosen One, saying he is a "disgrace to the Vault Dweller's memory," and disband. He will also disband if the Chosen's Charisma drops below 5 while Lenny is recruited, or he is given too many orders to move or change position, Lenny will complain about the Chosen One being "cantankerous and ornery". The former situation is rarer, however.
Lenny was designed by Fallout 2 lead designer Matt Norton. The developers originally wanted Lenny to be able to turn into a glowing ghoul when he drinks too much radioactive liquor, but it was never implemented in the original game.
Chris Avellone in Extrasode Episode 61 criticized the design of Lenny, describing him as a character whose function in the game is to be shot at.