This is just beautiful.
From left to right:
Top row: Pokeball, Pokeball.
Middle row: Heal ball, Masterball, Great ball
Bottom row: Love ball, Pokeball, Dive ball, Cherish ball.
This was merely an “attempt” (according to the person who made them), but damn, I wish my attempts would look as good =(
The OP made a tutorial that you can find here.