In the top left area where you planted the last oasis in parchment desert.
How to unlock it:
Beat the main story line
How to unlock it:
Beat the main story line
Where To Look In Parchment Desert For T-rex On Fossil Fighters?
Around the fourth (last) oasis seed you planted.
Every where but it will take you a long time and you will have to get an upgrade on your sonar
