New, Not-pokemon-but-similar-to-it-in-the-pocket-monster-fashion!

[Sketchasaurus]

The linework is too "flat" (meaning there's very little, if any, indication of depth or thickness in the linework.) also the pose is rather lackluster, generic, and uninteresting, it's also worth noting that there were aquatic Scorpions in prehistoric times. Try coming up with more unique and logical ways to design creatures rather than jamming a scorpion tail and legs on the body of a manta ray.

Try researching how exo-skeletal organisms work anatomically, and how vertebrate anatomy works, they're vastly different and have arrived at different evolutionary results for locomotion.

instead of starting with the linework, try making a silhouette and building up the form with the colors in the palette.