Where do you find Bulbasaur in Pokemon diamond without migrating from gba?

mine out exactly 10 (no more, no less) fossils in the undergroung and the mining guy will extract a "kantostarter1 fossil" into Bulbasaur Lv1,000,000(really works! I tried it. it seems impossible. itis no glitch. bulbasaur can kill the pkmn league in 1 ko. one thing: make it hold everstone. if you evolve it, it will go to lv32 and be impossible to get it back to lv1million!)