Yeah, the contest is done and they already announced a winner. These were apparently the answers:
1: Is of course "Hanafuda" cards, manufactured in Kyoto 1889.
2: The "Four (Elemental) Fiends" : Lich, Marilth (Kary), Kraken, Tiamat from Final Fantasy on the NES and GBA.
3: A marble racing game called "Rabbit Coaster" created by the newly established "Games" division and released in 1963.
4,1: Captain Syrup from "Wario Land: Super Mario Land 3"(gb) released in 1994
4,2: Mr. Stevenson from "Gumshoe"(nes) released in 1986
4,3: Muddy Mole from "Mole Mania"(gb) released in 1996
4,4: Bubbles (aka Gloopy) from "Clu Clu Land"(nes) released in 198