As we all know by now Jiriaya's frog song genjutsu is very powerful and effective. However, it might not be as effective on Itachi as it does on Pein. Pein is the weilder of the Rikodou which only specialize in Ninjutsus and nothing more. The Sharingan on the other hand is the master of genjutsu as well as taijutsus and ninjutsus. And Itachi is the master of genjutsus with Tsukyomi and the Sword of Tokatsu.
With that said, do you think Itachi will be able to dispell Jiriaya's genjutsu with his sharingan? He will get caught in it but unlike Pein he would be able to break it.
Also, I don't think Jiriaya genjutsu would have any effect on Susanoo so even if Itachi is caught in a genjutsu there is no way Jiriaya would be able to kill Itachi while Susanoo is activated and before Itachi break the genjutsu and go back on the offensive.
With that said, do you think Itachi will be able to dispell Jiriaya's genjutsu with his sharingan? He will get caught in it but unlike Pein he would be able to break it.
Also, I don't think Jiriaya genjutsu would have any effect on Susanoo so even if Itachi is caught in a genjutsu there is no way Jiriaya would be able to kill Itachi while Susanoo is activated and before Itachi break the genjutsu and go back on the offensive.