The Wolfpack subtheme was one of a number of factions of LEGO's Castle theme introduced in 1992 and ran into 1993. The Wolfpack was a feared group of renegades that won't let anything or anyone stop their quest for riches.
The Castle theme is one of LEGO’s primary themes first introduced in 1978 and based around medieval life with castles and knights. It is currently the third longest-lived theme in LEGO history. Over the years it saw numerous changes thus introducing various fantasy elements.