The BEST episodes written by Akira Horiuchi
#1 - His Name Is Diavolo
JoJo's Bizarre Adventure (2012) - Season 4 - Episode 33
Bucciarati managed to win in his battle against Secco, but his body was reaching its limit. The boss had already arrived in Rome and used Doppio to get closer to Bucciarati. Bucciarati’s condition worsens and he mistakes Doppio as Trish and Doppio plays along. The man with the secret to defeating the boss was waiting for them inside the Colosseum. Time then skips and the boss’s true identity is revealed.
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#2 - King Crimson vs. Metallica
JoJo's Bizarre Adventure (2012) - Season 4 - Episode 27
Risotto figures out that Doppio must be a Stand user that the boss trusts in deeply because he’s able to hear the noise from a certain Stand. Risotto then uses his Stand Metallica against him. Metallica is able to control magnetic force and attacks Doppio. Doppio uses the part of the boss’s power he received from him. While they’re fighting, Risotto realizes that Doppio’s personality and actions seem to be changing and he realizes exactly who Doppio is.