This papercraft is the Koops, a Koopa Troopa from Petalburg, and the second partner to join Mario's party in the game Paper Mario: The Thousand-Year Door. The paper model was created by Sabidiet. Very much like Kooper from the original Paper Mario, Koops can retreat into his shell and use it as a weapon against foes, and Mario can also launch him at switches or distant objects to hit them or retrieve them. However, he differs from Kooper in that Mario can hold Koops' shell in place.
Koops first meets Mario in Petalburg. He doesn't say much, but before Mario leaves to another part of town, he stops him, then his shyness overcomes him and he goes back. When Mario goes off to Hooktail Castle, he stops him again and is firm that he wants to join Mario's party in order to avenge his 'dead' father, but not before Koopie Koo finds out. She begs him not to go, but he says he has to be a strong Koopa for her. She gets mad, withdraws into her shell, and fires herself at Mario and Koops.
Inside the castle, Koops finds a skeleton that he believes is his father's. Reading the note the corpse was grasping reveals it was actually Kolorado's father. Koops is slightly embarrassed, but then wonders if any of the other skeletons is his father.
When Mario and Koops first meet up with Hooktail, the dragon remarks that they look similar to one that passed by here recently. The battle then starts. Once the fight is finished, a near-dead Hooktail spits up Koopley, who was living in Hooktail's stomach for ten years. After a touching reunion, Koopley reveals he found the Diamond Star in Hooktail's stomach, and allows Mario to take it.
After assisting Mario in his quest to collect the rest of the Crystal Stars and save Princess Peach, Koops returns to Petalburg where he makes plans to marry Koopie Koo and run for mayor.
Paper Mario: The Thousand-Year Door, released in Japan as Paper Mario RPG, is a role-playing video game developed by Intelligent Systems and published by Nintendo for the Nintendo GameCube.
The Thousand-Year Door borrows many gameplay elements from its predecessor, the Nintendo 64 game Paper Mario. These elements include a paper-themed universe and a turn-based battle system with an emphasis on action. For the majority of the game the player controls Mario, although Bowser and Princess Peach are playable at certain points. The plot follows Mario's quest as he tries to retrieve the seven Crystal Stars and rescue Peach from the X-Nauts.
The game opens with an introduction about a seaside town which was damaged by a cataclysm and consequently sunk into the depths of the earth. A town named Rogueport was later built at this site, with the fortunes of the lost kingdom fabled to exist behind the eponymous Thousand-Year Door, located in the ruins of the old town. Mario becomes involved when Princess Peach contacts him about a treasure map that she bought in Rogueport, but becomes part of a larger adventure after learning that Peach has gone missing. With the help of Goombella and Professor Frankly, Mario learns that the map can potentially reveal the location of the seven legendary Crystal Stars, which are required to unlock the Thousand-Year Door. Under the assumption that Peach herself is trying to find the Crystal Stars, he uses the map in an attempt to locate her.
In actuality, Peach has been kidnapped by the Secret Society of X-Nauts, a group led by Sir Grodus that are also searching for the Crystal Stars. While held captive, Peach uses e-mail via the main base's computer, TEC, to inform Mario about the quest and consequently help him to attain all seven Crystal Stars and locate the treasure. However, the "treasure" is actually the Shadow Queen, a demon responsible for the ancient cataclysm that destroyed the original town 1,000 years ago. The X-Nauts had kept Peach so that her body could be possessed by the Shadow Queen in a bid to recover her full power. This happens, but the arcane power of the Crystal Stars is then used to separate Peach from her possessor. The game ends when Mario defeats the Shadow Queen and subsequently returns to his house. Then a scene pops up in which Mario is telling his brother Luigi what had happened.
Additionally, Luigi, at various points in the game, talks about his own adventure that took place in the Waffle Kingdom. This was a kingdom which owned a compass that could tell the future. While this compass brought the kingdom much prosperity, it was soon abused. As a result, the kingdom was cursed and was struck by a great cataclysm 1,000 years ago. Luigi's account of his own adventures is meant to be a humorous parallel to the adventures of Mario. Luigi is accompanied by a different partner, and has a new story roughly each time the player finishes a chapter in the main story line of the game. Luigi's tales often drag on, usually putting Mario and his partner to sleep. Luigi's partners offer a more disastrous account of events, which usually entail a near-fatal blunder by Luigi, and his subsequent rescue by the companion at hand.
You can download the paper craft model here: Paper Mario: The Thousand-Year Door - Koops Free Papercraft Download