"Ghost"
I believe you are talking about Shadow creatures, these monsters are more easily defeated as a wolf with Midnas powers. After you defeat them, shadow creatures leave a spot that enables you to warp from anywhere to exactly where you defeated them.
I don't think so. Although, it was referenced briefly in the Red Pyramid, when Amos said, "Manhattan has other problems, other gods."
Although this might not be the answer you want, there is no shadow killer in Sacred Stones. If you mean a weapon to kill dark creatures, there are a lot of them. But nothing called a Shadow Killer.
Well, no trees have a shadow if it is dark, or if they are shaded by a bigger tree. But a family tree may have no shadow.
Spirited Away
Fakeout: Shikamaru's Comeback!Despite Tayuya's efforts, Shikamaru has devised a plan to defeat her creatures. Using a flash bang to lengthen the shadows in the area, Shikamaru captures the creatures and prepares to turn them against Tayuya. To prevent this, Tayuya calls off the creatures, making them disperse. Despite this, Tayuya is captured by Shikamaru's shadow, forcing her to advance her cursed seal to its second state to escape. With Tayuya now strong enough to overpower his shadow, Shikamaru decides instead to use his shadow for attack, and attempts to use his shadow to strangle her.
there is a thee headed snake and a gaint minotaur there is a thee headed snake and a gaint minotaur
Death Has a Shadow
its shadow the hedgehog o fcourse cuz i went asked all of my family and friends they said its shadow and + i love him :3
Moon Shadow's entire family isn't in theUnited states because the "demons" didn't want chinese settling on the Land of the Golden Mountain permanetly
Other than the two both being hedgehogs, they have no family relations.But shadow was created using sonic's DNA
they wanted her to be scary so it was a ghostly shadow or something like that