During the battle with Seth, defeat his first dinosaur then lose. You will get the awakened form of the first dinosaur.
Just how to get some dinos
Defeat Dr. Z. A message stating that the seal on the Ancient shrine has been broken will appear. Then enter one of the following passwords in Europe next to the shrine to unlock the corresponding bonus.
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Successfully complete the "Father" quest.
Successfully complete the game.
Once you unlock the stone circle at South Euro you can input these codes to unlock dinosaurs, after you input the code go to the temple to get your dinosaur card. Each of the dinosaurs are at level 1.
Defeat Dr. Z. A message stating that the seal on the Ancient shrine has been broken will appear. Then enter one of the following passwords in Europe next to the shrine to unlock the corresponding bonus.
Successfully complete the game.