Claim: 2018 Canadian Championship(a soccer tournament)  has six clubs, one of which Montreal Impact that had no other appearances.
Evidence: The 2018 Canadian Championship was a soccer tournament hosted and organized by the Canadian Soccer Association. A.S. Blainville Montreal Impact Oakville Blue Devils Ottawa Fury Toronto FC Vancouver Whitecaps FC The Montreal Impact (French: Impact de Montréal) are a Canadian professional soccer team based in Montreal, Quebec. The Impact competes as a member of the Eastern Conference in Major League Soccer (MLS). The team began play in 2012 as an expansion team of the league, being the league's third Canadian club, and replaced the North American Soccer League team of the same name. The Impact won the Canadian Championship in 2013, 2014 and 2019. Statistics include previous incarnations of the Montreal Impact and Vancouver Whitecaps.