Phoenix Buchanan is the main antagonist in the movie Paddington 2. He is a washed-up actor who lives near the Browns.
Paddington saves up money to buy a pop-up book for his Aunt Lucy's birthday, but a thief breaks into the antique store where it is held and steals it. The thief escapes and turns out to be Buchanan in disguise, and Paddington is arrested for the crime.
It turns out that the book holds clues to the whereabouts of a fortune, and Buchanan assumes other disguises to find the clues. Meanwhile, the Browns begin to suspect him and eventually find his costumes and the book in his attic, proving him to be the culprit.
With the help of some of his inmates, Paddington escapes from prison and boards a train with Buchanan, which carries an organ where the treasure is hidden. Buchanan tries to access the fortune in the organ, but Paddington and the Browns confront him and knock him out. He is later arrested and continues his acting career in prison, and Paddington's name is cleared.