Here are some sketches, where I tried the pen tool and some copic marker brushes I downloaded.
They're Pearl/Jun/Barry/Perla and Diamond/Kouki/Lucas/León from D/P/P. I really like these guys (my fave pokemon trainers), in the manga they have a pretty close bond, and a funny behavior, they're like... Kenan & Kel.
And Dia/Lucas dresses freakin' well in Platinum.
All the things on this pic were drawn out of memory, I didn't use any references this time.
Pearl/Diamond from pokemon belongs to Nintendo.