Why was Conan called a detective by Bumei in episode 647?

Because Conan once said "I am Conan Edogawa, a famous detective" in front of the bad guys. Ah, over time, they also agreed with this statement. . . . . .

The following is a dynamic picture ~ (I didn't make it, I hope the producer understands that I used your picture when solving other people's problems), but it's not clear which episode he started from. It may be the episode where Ai first appeared, episode 129. You can call me again if you have any questions ~