Game info: These souped-up Shadows hit hard and fast with their jump attacks; if they're in the air, better get out of there. Once they melt into the ground, they're beyond the reach of most attacks, but that's nothing a little Water magic can't fix. Fight puddles with puddle!
Wiki info: The Neoshadow is a Pureblood Heartless that appears throughout the Kingdom Hearts series.A Neoshadow has a more humanoid body structure than a normal Shadow, but shares the same pitch black skin and spherical, glowing yellow eyes. Its crooked antennae are quite long and fall back behind the Heartless. It seems to be rather muscular, and its hands are very large, each one sporting five clawed fingers. Its feet, like those of a normal Shadow, are long and lack digits, but a Neoshadow's feet more resemble boots. Its body is also lined by several faint, blue veins of color. The name "Neoshadow" is derived from the prefix "neo-", which means "new", and "shadow".
