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.
But who could it possibly be? 
I haven't the slightest idea...
...لكن من يكون؟ لا أملك أدنى فكرة
Aber wer das sein könnte?
Ich habe nicht den Hauch einer Ahnung.
Pero ¿quién podría ser?
No tengo ni la más mínima idea…
Pero ¿quién podría ser?
No tengo ni la más mínima idea…
Mais de qui s’agit-il ?
Personne ne me vient en tête !
Ma chi potrebbe mai essere?
Non ne ho la minima idea...
Mas quem poderia ser?
Não faço a menor ideia...
Знать бы, с кем!
Мне никто не приходит на ум!