Here are some that I came up with. (note: you don't have to use these names, except for the last if you use it, since it is my navi)
(Pure)Earth Elemental:
Element - Earth(obviously)
Stats - Great HP and defense, Good Attack, poor speed
Description - At first looks like a huge rock with many intersecting cracks. In the sections created by the cracks are smaller cracks that don't touch any others. Around this creature are fist-sized and head-sized rocks.
However, the cracks in the seperate sections formed by the larger, web-like cracks open up to reveal eyes, and it controls the rocks around them, making them float
around it.
Attacks - uses the flying rocks, crashes into its enemy, or shoots out "dust beams" out its eyes
More info - created from pure Earth elemental power
Reversed Soul:
Element - Dark
Stats - very high stats! Lowest stat is defense
Description - all black, except for its glazed white eyes. It looks like a cross between a monkey, a wolf, and a preying mantis; it is vaguely humanoid, with sharp, sickle-like hands. Basically, a Neo-shadow if Kingdom Hearts was made by the greatest horror writers in the world.
Attacks - uses the sharp sickle-hands, wraps around its enemy, or rends them with sickles and fangs
More info - a spirit-being created from a person whose soul was distorted by corrupted Dark elemental power.
Imp:
Element - Psychic (main is psychic, but there could be Fire Imps, Water Imps, etc.)
Stats - all except speed are pathetic; speed is above average
Description: short, yet somehow very stretched out, humanoids. Their eyes are set wide. They have very sharp teeth. The two strangest things are their fingers and their forehead. On an imp's forehead are gills. They have five digits on each hand - three fingers and two thumbs. Their feet are identical to their hands.
Attacks - biting, headbutting, and shooting psychic bubbles out of its mouth and hands
More info - hang around stronger enemies
and finally....
Kitsune:
Element - Fire in physical realm/psychic in meta-physical realm
Stats - great speed, above average HP and defense, good attack
Description - a: (physical realm) red-orange, three-tailed fox; (meta-physical) huge, nine-tailed fox.
Attacks - (both) summon three fireballs, used as defense; a "roar/growl/howl" that hits all; a "roar/growl/howl" cannon to one. (Physical) a flame that hits all, sets himself on fire to use as a physical attack counter. (Meta-physical) uses strategic attacks, such as status effect-causing ones, and healing abilities
More info - if possible, is like a "wandering pokemon", can be found as a boss but isn't always in the same place, and the realm it is in decides its power. Is based on my navi, as well as the mythical kitsune. If you want, it could at first be disguised as a human.
How is that?