The fact that there is still awesome Pikmin fan art out there that I haven't seen yet is just awesome. I don't know what you cal the technique that you used to get this stylish look, but I really dig it.
Pikmin can be considered a very cute, but disturbing game. Ever read the lyrics for the Japanese theme song of the game? I think it's called Ai no Uta... iirc. It has the same cutesy but melancholy and morbid feel. xD
As for the drawing, love your bright, crayon-like style. It works well in contrast with those poor perilous Pikmin. All those ghosts seem to indicate a lot of Pikmin died that day-- and those looming creatures in the shadow can only bode for the worse.