Bakuryuu Sentai Abaranger (2003)

Scientists at first believed that the dinosaurs were wiped out by a meteorite 65 million years ago, in truth the meteorite split the Earth into two dimensions: Dino Earth & Another Earth. Dino Earth is the Earth where the Dinosaurs are the superior species while Another Earth is the Earth in which humans are the dominant species. In Dino Earth, a long raging war between the inhabitants known as the Dragon People and the Evolions(a entities from the meteorite) has commenced for as long as anyone could remenber. One day, Asuka of the Dragon People traveled to Another Earth via a trans-dimensional portal and was followed by the Evoliens who had three Bakuryu(dinosaur mechas) under their own control. As the Bakuryu attack Tokyo, a distress call was sent to three humans with "Dino Guts" to tame each of the three Bakuryu. Upon taming their own Bakuryu, the three lucky humans have form the team known as Abaranger with the sole purpose of protecting their Earth from the Evoliens.