Zelda Papercraft: Stalchild and Tomb

Stalchild is an undead skeleton that appears in the Legend of Zelda series. It seems to be closely related to Stalfos but is more child-like and unarmed.
Zelda Papercraft: Stalchild and Tomb

Super Mario: Mushroom Papercrafts

These different coloured mushrooms by Skelekitty and Paperbuff are photoshopped version of Icthus7's Power-Up mushroom. Basing on their color, they're composed of Power-Up, a 1-Up, Poison, Super Mega, Super Mini, Life, Volt, and a Slow mushroom.
Super Mario: Mushroom Papercrafts

Alfred E. Neuman Paper Mask

Alfred E. Neuman is the iconic fictional mascot of the long running American satirical magazine, Mad. Since he was first seen on the front of Mad in the mid 1950's, Alfred has appeared on all but a handful of covers invariably accompanied by the printed phrase "What, me worry?" This mask is a scan from an old issue of Mad and may be downloaded here.

Super Mario: Princess Peach Papercraft

Princess Peach is the princess of the Mushroom Kingdom in the Super Mario World. She used to be known as Princess Toadstool until 1996 but it was changed to Peach when the name was added in Yoshi's Safari.
Super Mario: Princess Peach Papercraft

Pokemon Papercrafts: SWINUB and PILOSWINE

Swinub, the one on the left is a dual-type ice/ground Pokémon. They are found in areas with frigid temperatures and are covered in dense hair to keep them warm.

Piloswine on the other hand is also an ice/ground-type Pokémon and is the evolved form of Swinub.
Pokemon Papercrafts: SWINUB and PILOSWINE