|The following is based on information from Fallout Tactics.|
Man's Best Friend! Great for sneak and recon work. His only combat specialty is HtH (Hound to Hound) but he can disarm traps. He has really bad doggy breath though.
Lucky is the only named dog character in the game and the only playable dog in the whole Fallout series.
Lucky appears only in Fallout Tactics multiplayer.
Behind the scenes
Despite a name and description suggesting the opposite of him being a jinx, Lucky possesses the the Jinxed trait (which affects everyone around him). This is a reference to the pariah dog from Fallout 2.