have they won the championship mentioned above?
Yes, they won the Premier League in 2018
Manchester City F.C.
Under the management of Pep Guardiola they won the Premier League in 2018 becoming the only Premier League team to attain 100 points in a single season. 
which team has won the epl most times UNANSWERABLE which four teams dominated it in last millennium? Arsenal, Chelsea, Liverpool and Manchester United. did the same teams maintain their dominance in new millennium as well? Yes did any new teams also emerge as dominant ones? Yes, Tottenham Hotspur and Manchester City was there anything different about 20-21 season? Yes, qualification criteria where is the first new team mentioned above based? Tottenham, London who are its rivals? Arsenal, Chelsea and West Ham United does the second new team have any honorable mentions in any museums? Yes, ormer Manchester City players and managers are inductees in the "National Football Museum Hall of Fame", and the "Scottish Football Museum Hall of Fame"
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Manchester City F.C. [SEP] Introduction
Under the management of Pep Guardiola they won the Premier League in 2018 becoming the only Premier League team to attain 100 points in a single season. In 2019, they won four trophies, completing an unprecedented sweep of all domestic trophies in England and becoming the first English men's team to win the domestic treble.