I hate to ask the stupid question, but why not just be the Conservative Party?
The short answer: there is still a registered PC Party in Saskatchewan.
Long answer: In the late 1970s, the PCs replaced the Liberals as the anti-NDP right-wing party in SK politics, after the Liberals had lost reelection in 1975. The PCs under Grant Devine won the 1982 and 1986 elections with majority mandates. Grant Devine, besides being an incompetent domkop in power during a recession, was also a criminal and it quickly turned out that his government/the PC Party were criminal organizations. 12 PC MLAs were charged (after he lost reelection in 1991) with fraud. The PCs fell to 5 seats in 1995 and the Liberals replaced them in OO, and as the scandal kept on giving, the 4 remaining PC MLAs in 1999 ran for reelection or the SaskParty (the fifth one had previously resigned after being found with a teenage prostitute).
So while the SaskaTories attracted four PC MLAs and five (out of 11) Liberal MLAs by the time of the 1999 elections, neither party disbanded. The PCs are kept alive on life support by a small group of people who run only a few candidates each election (5 in 2007 and 2011) to keep the party registration and, by extension, control of the party's assets. The Liberals still won 3 seats in 1999, but they formed a coalition government with the NDP and the party began collapsing when the new leader in 2001 ordered them out of government but two of the MLAs refused and then ran for reelection with the NDP in 2003, and the remaining Liberal Party still won 14% (but no seats) in 2003 and 9.4% in 2007. Since then, the remaining Liberals just gave up and the party has been taken over by libertarians who ran only 9 people in 2011.
