Can the shadows on the characters be removed?

Sure. You can just open the Aseprite file (.ASE), hide the Shadow layer, and export the desire animation.

Thank you, I am going to buy the enemy package. If I wanted a character like the dog in my profile with the same type of art as the enemies, with the animations for idle, running, jumping, sword attack, bow attack, climbing stairs, swimming, parkour, and dying, how much would it cost?

Thanks.

Well, that's a lot of animation. Depending on the size of the character, it could cost between $250 and $500 approximately.