for me...!!

natsume in alice academy^^

hehehehehh!!

Does Astro Boy count? He was "made ready".

i don't know if he counts as a "boy" but, desert punk seems incredibly quick-witted and intelligent.

that guy Lelouch from Code Geass comes to mind

Edward Elric is pretty smart too. Maybe not as strategic as Lelouch, but he has an immense capacity of learning and cracking ciphers.

The first one comes to my mind is Kaito Kuroba from Magic Kaito.