other than trading none that i know of
Tirtouga's shell is something you find on the ground using the dowsing machine
you can get both Pokemon pearl and diamond Pokemon on the game if you go underground
you cant
In Nacrene City, you can find Archen and Tirtouga in the Dreamyard, a location accessible after you obtain the first gym badge. Specifically, Archen can be found by using a hidden item or encountering it in the area, while Tirtouga is available as a reward for players who choose to revive fossils at the appropriate location in the game.
the woman in relic castle has two you get the cover fossil(which gives you tirtouga)or you get the plume fossil(which gives you archen)or if you go to icirrus city go to the cave go left to you have options go up then left then go up the stairs keep going straight out of the cave straight to you see the first cave left you'll see a cave soon go in go straighther's aman facing the wall go to him he'll give you the skull fossil which has cranidos you fly of walk to the Pokemon center at the 2nd gym put 1 Pokemon away go out to the gym go to the lady on the right hit a keep hiting a or if it's another device then ds watever control it is for yes and u can nicnam it.
to get fossil Pokemon in heart gold and soul silver in pewter city someone in pewter museum says he revives fossils and you can get them using rock smash in ruins of aiph and other places.
You can get an: Old Amber Helix Fossil Dome Fossil These are found at the Ruins of Alph by using Rock Smash on rocks. Note: You may also get other items/Pokemon by smashing rocks.
the same way you would without a Pokemon modifier the same way you would without a Pokemon modifier
You can get a Shieldon from reviving the pokemon from the armor fossil. Shieldon evolves into Bastiodon at level 30. The Armor fossil be found underground using the mining pick.
hach an egg or surf
Maybe.
Yes. You could bike or walk.