Chasing Lee

 Starting from Richfield Coin Cat(image below):

Go SouthEast on to the next map(image below).

Go North East and not to the boat and on to the next map which is shown below.

Proceed to the center of the map and voila! Lee is waiting to slap yer ass as he did mine T_T.

Chasing Choji

Starting from Richfield Cat(image below).

Go down(image below).

Voila! Choji(image below).

Chasing Sasuke

How to get to Konoha Hospital Roof:

Starting from the richfield coin cat:

Go left(image below).

Go  to the next map(image below).

Go down(image below).

You have reached the hospital(image below).

Go up the stairs(image below).

Greet Sasuke with a punch if applicable(image below).