How do you get t-rex on dinosaur king ds?

Go to South Dust Hills then ride the Pterodon to the other side then go down then you'll see a man who will give you a picture then go to the D Lab then Minmi will say that It's a Tyrannosaurus pic. then come back to the man where you got the picture then he will give you a note then Go to West Dust Hills Then follow the note and it says: left 5 times, up 23 times,right 2 times,down 1 time,left 7 times,

up 3 times, and left 2 times then dig!!! But you will need the 3rd drill and the super deluxe radar, Then you will get a N. America Fossil which is a Tyrannosaurus.