Peascorp is a Scorpio moga. It is common. It can be obtained at Miasma Depths, Shadowmire Bulwark, Darkwood, Mourningwood Pass, and Oakford Shade. It's MogaDex entry is the following;
The peascorp is truly a beautiful creature to behold, blending the hypnotic pattern with the creepy insect carapace of the scorpion. Peascorp shells are popular as wall hangings and rugs, and can even be used as hosiery.
Zodiac attack: Multisting / Bladewing (after reaching Multisting 5)
Power: Zodiac Weakness