Artists Birdy Chu took some base level Pokemon like Pikachu, Bulbasaur, Squirtle, Charmander, Eevee and more, and gave them little outfits to cosplay as their final forms. The drawings were done with pen and colored pencil on paper, and you can purchase prints of all the designs over on Birdy's Tumblr.
These drawings are disgustingly cute. Look at them in their little onesies and little shoes! Bonus: Birdy even did a drawing of the new Sylveon Eevee evolution from the upcoming Pokemon X/Y .
Birdy Chu Art [Tumblr, via Geekologie]
via destructoid http://www.destructoid.com/too-cute-pokemon-cosplaying-as-their-final-form-248051.phtml