Is Detective Conan episode 137 filler?
Canon No, episode 137 of Detective Conan is canon.
#137
The Old Blue Castle Investigation Case (Part 2)
後編)
Aired 1 Mar 1999
Canon No, episode 137 of Detective Conan is canon.
#137
The Old Blue Castle Investigation Case (Part 2)
後編)
Aired 1 Mar 1999