Find The Scientist At Ebony Coast
Get into the Ramdozer at the start and get behind the train. You will see a TNT box. Push it into the breakable wall behind you. Now put the Ramdozer on the train and get in. Take the train to the stop and get into the Ramdozer. Destroy any buildings that are around. Now push the TNT box onto the train. Now get into the train and take the box of TNT all the way back to the start and through the door that you blew up. Stop the train when the TNT is in line with the large statue head. When it explodes, the statue will be destroyed and J-Bomb will be there.
Get out of the train and get into J-Bomb. Take J-Bomb to the middle of the first train tunnel (it's grey). Fly up and right over the hill. You will eventually find the scientist, but can sometimes be tricky to find. Once found you can finish up with the level.