sm12836105 - 任天堂公式ビデオ　マリオペイント | Mario Paint PV with Prototype footage

Origiinal NND URL:
http://www.nicovideo.jp/watch/sm12836105

A "Mario Paint Official Video".
It features quite a bit of deranged animation and some gameplay of the bug-swatting minigame.

EDIT: LuigiBlood just told me that this video uses the Prototype of Mario Paint. The very one NintendoPlayer released here;
http://www.nintendoplayer.com/site-updates/mario-paint-snes-prototype-release-in-dedication-to-bob-ross/

Interesting to know!