Whats a good way to get the fossil that make your dinos evolve I really..

1. Put on a colored mask, then go to a site where there are few to no fossils of that color. Example: Blue mask, Mt. Krakanak, red mask, Icegrip plateau. You get the idea.
2. Collect dropping fossils. There's a guy in the Hare Club on Cranial Isle that collects them. First he gives you a jewel rock for one, then other prizes for 2, 4, etc. When he starts asking for 20 fossils at a time, he'll give you a gold fossil for each twenty. You get the darned things anyway, this is a way to make them useful.
3. I frequently find miraculous fossils in the pay-to-dig sites. Try the Treasure lake and the Icegrip plateau sites.
Good luck. Hope this helps.

In addition to the prioly stated ways, it is possible to get miraculous fossils for 2,500 DP. It takes way too long, but it's possible.You can start a new save file and get the miraculous fossil in the storyline, too. (After beating the game, you can carry over your dinosaurs to a new save.)