[1] He possibly started this pilgrimage together with his cousin Wartislaw VII of Pomerania-Stolp, who had to break off the journey due to illness.
Sometimes, however, Duke Barnim VI himself operated as a pirate, leading to a tense relationship with the Hanseatic League and the Teutonic Knights.
He settled his dispute with the Grand Master of the Teutonic Knights in March 1406 and undertook a pilgrimage to Rome, where Pope Gregory XII gave him a Golden Rose.
In the struggle between the Dukes of Pomerania-Stettin, i.e. Swantibor III and later his sons Otto II and Casimir V against Elector Frederick I of the Mark Brandenburg, Wartislaw sided with the latter.
However, Wartislaw then had to travel back to Pomerania to deal with riots and could not participate with the council, such as the burning of the heretic John Huss.
After his death, his widow Agnes and regency council acted as regent for his own sons Barnim VIII and Swantibor IV as well as his brother's sons Wartislaw IX and Barnim VII, until Wartislaw IX, the eldest of the four, took over in 1417.