This is a design i've recently started working on which originally was just a TS!US Papyrus my take thing but i'll likely have it as a design for my own take on Underswap or something i dunno.
His design is mainly based around both his character and the area he's from, Sunnedout (which i'd likely call something different in GP!Swap? askdaoskdaos.) His design overall was based off of Trunks' design from Dragon Ball GT. Several details and the sprite itself are very inspired by some work my friend Chip Potato has done so please check them out: toughstuffmuffs.tumblr.com/
I have yet to detail this baby's life so in the next update of this deviations i'll def add some additional sprites and some info regarding him.