[He is several years into Sasori's future if the information given is anything to go by.]

[Itachi does notice that crow-like Pokemon. While he's not all that familiar with his own Murkrow quite yet, Itachi does know crows.]

Keep shiny objects on you. It may quell the urge to steal things from other people.

[If people can find him based on the music playing then Sasori must be in the same place.]

Perhaps it would do it good to battle with another Pokemon. Shall we test yours against mine?