CommentStreams:F0dde61140a407687caf5a917022e7f6
From The Lost Media Wiki
And also, Bakeruno Shogakko did have 39 episodes. The prequel series had 20 episodes and the more well-known series had 39. I'm guessing that people got that confused, and the number of episodes from both series were combined, so I guess that's where the 54 came from https://ja.wikipedia.org/wiki/%E3%83%90%E3%82%B1%E3%83%AB%E3%83%8E%E5%B0%8F%E5%AD%A6%E6%A0%A1_%E3%83%92%E3%83%A5%E3%83%BC%E3%83%89%E3%83%AD%E7%B5%84#%E6%94%BE%E9%80%81%E3%83%AA%E3%82%B9%E3%83%88