Debut Episodes of Rival Characters in Detective Conan (Case Closed)? I used to watch Detective Conan when I was younger and remember I got through the first 100 or so episodes. The most prominent "rivals" of Conan from what I remember was Kaitou Kid and Heiji Hattori. Who are some other characters that come later in the series and which episodes do they first appear?
Notable characters

Kaitou Kid
Heiji Hattori
Subaru Okiya/Shuichi Akai
Rei Furuya/Bourbon
Makoto Kyougaku
Masumi Sera
Eisuke Hondou
Haibara Ai/Shiho Miyano
Kazuha Toyama(Hattori Heiji's Love Interest)
Black Organization(First,Second and Third in command-Third one is Gin and you should check the members)
Maybe also check Ran's Mom and Kudo's Mom's rivalry,Kudo's father and Kid's father's rivalry

From Magic Kaitou-
Aoko Nakamori(Kaitou Kid's Love Interest)
Ginzo Nakamori
Akako Koizumi
Saguru Hakuba

From Yaiba-
Yaiba Kurogane
Soshi Okita

Also a crossover with Lupin the third