This pokemon papercraft is Slowbro (Yadoran), a dual-type Water/Psychic Pokémon, based on the anime / game Pokemon, the paper model was created by javierini. It evolves from Slowpoke starting at level 37. It is one of Slowpoke's final forms, the other being Slowking. It can Mega Evolve into Mega Slowbro using an unknown Mega Stone. As Mega Slowbro, its Defense and Special Attack stats increase.
Slowbro is a bipedal, pink Pokémon with a tan, striped belly and a tan muzzle. It has large, vacant eyes, curled ears, and two pointed teeth in its upper jaw. On its hands, it has three clawed fingers, and two clawed toes on its feet. There is a Shellder attached to its tail. This Shellder has a gray, spiraled shell with darker spots. There are several spikes across the surface of Shellder, and it holds onto Slowbro with many sharp teeth. If Shellder is knocked off, Slowbro will return to its unevolved form.
Slowbro has lost the capability to feel pain due to Shellder's poison. However, it apparently becomes inspired when Shellder bites down. While it is capable of unleashing powerful psychic attacks, it is peaceful and prefers not to fight. Because it can no longer fish using its tail, it swims to catch its prey and allows Shellder to feed on its scraps. Slowbro tends to live near ponds, lakes, and seashores.
When Slowbro Mega Evolves into Mega Slowbro, it becomes engulfed by the Shellder to the point where only its head, arms and tail are visible. The spiral Shellder loses its own tail, allowing the tail of Slowbro to stick out, which it balances on due to its legs being engulfed. The spikes on the Shellder are now reduced to four on the bottom section of its body, and the darker spots only visible on the middle section. [Source: Bulbapedia]
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