I'm pretty sure it comes in a fossil.
Shieldon (Armor Fossil) are only available to Pearl, similar to how you can get Cranidos (Skull Fossil) in Diamond but not in Pearl. In Diamond, you can get a Shieldon by trading with a friend who has one in Pearl.
you can find Shieldon by digging fossils so no he is not exictint, and its only on pearl
Shieldon evolves to Bastiodon at lv30.
There's one simple answer: trade! Cranidos is to Diamond as Shieldon is to Pearl, so find a friend who has Pearl and trade with them.
there r certain fossils and the fossil for shieldon is only in pearl, and cranidos only in diamond
There is no stone that evolves Shieldon.To evolve Shieldon you have to level it up to Lv. 30.
train it to level 40 to get bastiodon.
shieldon-fossil palkia-spear pillar
Revived from Armor Fossil (Pearl only)
its shieldon not sheldon. you get it by going underground and searching for fossils.
You have to use your explorer kit and you have to have a pearl version. First you use your explorer kit and then you dig into the wall. Sometimes you will get an armor fossil, then you go to the museum and turn it in to a Shieldon. Ta-da! Instant Shieldon. Hope this helped!
you can only find a cranidos on diamond and a shieldon on pearl