Here's a classic Sonic to celebrate his 25th year.
Classic Sonic the Hedgehog Papercraft

A highly-detailed, 45cm tall Tails the Fox papercraft from Destro2k. The model has 37 pages of parts.
Sonic Adventure - Tails Papercraft

A transformed version of the Tornado, a red two-seated, vintage-style biplane in the Sonic the Hedgehog series.
Sonic Tornado Papercraft Transformed Mode

Shadow is Sonic's arch rival who has appeared in several Sonic the Hedgehog video game series by SEGA.
Shadow the Hedgehog Papercraft

Amy Rose, formerly known as Rosy the Rascal is the female hedgehog who is in love with Sonic. this papercraft is from the Sega Dreamcast platform video game Sonic Adventure 2.
Sonic Adventure Amy Rose Papercraft

Miles "Tails" Prower is an 11 year old fox who fights along with Sonic against Dr. Ivo Robotnik. This version's from Sonic Adventure 2 for the Dreamcast.
Sonic Adventure 2 - Miles "Tails" Prower Papercraft

Yet another Sonic the Hedgehog papercraft. This one's created by Corbak.
SSBB Sonic the Hedgehog Papercraft

billybob884 has released a total of 13 power-ups from the old-school Sega Genesis video game Sonic 2.
Sonic 2 Item Boxes Papercraft

This is one of the better-looking Sonics we have posted. The model by Ashek has 23 pages of parts and stands at 43 cm tall.
Modern Sonic Papercraft

Knuckles the Echidna is the fourth most popular character in the Sonic series. It got its name from its four sharp knuckles.
SSBB Knuckles the Echidna Papercraft

It's Shadows from SSBB. This would make a perfect partner for the previously released Sonic which also stands at 40 cm tall.

SSBB Shadows Papercraft

This is the biggest and most detailed Sonic the Hedgehog papercraft to date. Composed of 24 pages of parts, the built model stands at 40 cm tall.
SSBB Sonic Papercraft

Silver the Hedgehog is a silver-furred anthropomorphic hedgehog from 200 years in the future of the main timeline. He first appeared in the 2006 Sonic the Hedgehog-wiki

Silver the Hedgehog Papercraft

WICKED-FAST: Sonic the Hedgehog is a seminal 16-bit 1991 platform video game developed in Japan by Sega and published for the Sega Genesis. It is the first installment in Sega’s flagship Sonic the Hedgehog video game series and the first title developed by Sonic Team. It was an enormous critical and commercial success for Sega, creating a popular, multiple decade franchise.

Desktop Gremlins' Sonic the Hedgehog papercraft is part of the Sonic Generations Art Show at Brave New Worlds in Philadelphia which will run until the end of December.
45 N. 2nd Street Philadelphia, PA
Hours – Sunday 11-6, Monday-Saturday 11-8
215.925.6525
Desktop Gremlins - Sonic the Hedgehog Papercraft

In Sonic Colors, Green Wisps turn Sonic into a round and spiky hovercraft to reach higher areas and allows use of the light-speed dash.
Sonic Colors -  Green Wisp Papercraft

Doctor Ivo Robotnik aka Doctor Eggman is the archenemy of Sonic the Hedgehog. Grab him now 'cause you'll be required to unlock him using 4Kids Rewards Points after a week!
Super Sonic: Dr. Eggman/Dr. Robotnik Papercraft

After the recent release of the Nintendo Wii game Sonic and the Black Knight, a game set in the world of King Arthur that combines Sonic's trademark speed with a new swordfighting system, Sega has released five official papercrafts to promote the game. There's Sonic's sword and masks/helmet of Gawain (Knuckles the Echidna), Sir Lancelot (Shadow the Hedgehog), Percival (Blaze the Cat), Sir Galahad (Silver the Hedgehog) and Percival (Blaze the Cat).
Official Sonic and the Black Knights Papercrafts