Box Office Bomb: Budget, $42 million. Box office: $30 million domestic, $39 million worldwide.
Creator Backlash: During his appearance on the Empire Podcast, Steve Coogan said he thinks "in 20 years' time when the dust has settled and people are able to look at Holmes & Watson objectively, [he thinks] people will say 'It's still rubbish'".
The Danza: John C. Reilly as Dr. John Watson. Although the character existed before Reilly was cast. And born, for that matter.
Fake Brit: Ferrell and Reilly are Americans pretending to be two of Britain's most famous literary characters.
Not Screened for Critics: The film opened on Christmas Day 2018 without having been screened for critics in advance. Predictably, they lambasted the film once they were able to see it.
Similarly Named Works: There's a 2012 Spanish film titled Holmes & Watson: Madrid Days. Incidentally, both films give a spin on the Sherlock Holmes mythology (this film being a parody and Madrid Days transporting Holmes and Watson to Madrid to investigate Jack the Ripper-style killings).
The film won four Golden Raspberry Awards: Worst Picture (making it Sony's second win in a row after The Emoji Movie, and the second time such a streak occurred for Sony after Swept Away and Gigli in 2002 and 2003 respectively), Worst Director, Worst Supporting Actor (John C. Reilly) and Worst Prequel, Remake, Rip-off or Sequel.