Tinkaton is a pink humanoid Pokémon, with large, white arms and short, stumpy toeless feet with light pink circles underneath. Its arms have five fingers each, with the thumbs having the same color of pink as the body. It has steel plates on its hips that resemble outturned pockets. Its face has silver eyes with thin eyelashes, and a large mouth with two square teeth-like growths on the upper lips. On top of its head is a large, pinkish-white growth resembling a twin-tail hairstyle, which droops over Tinkaton's back and has darker pink zigzag patterns accenting it.
Tinkaton wields a crude, gigantic metal hammer that weighs over 220 pounds (100 kg) and is larger than its own body. The hammer appears to have been made using the old hammer Tinkaton had as a Tinkatuff for the base, with several scraps of metal colored in varying shades of gray and purple welded onto it. The hammer also has a spiked beige axe-like structure on top. Although the hammer is heavy, Tinkaton can swing it with ease by using its whole body.
Tinkaton is intelligent and has a reckless personality. It swings its hammer at rocks to send them into the sky, aiming to hit flying Corviknight. This Pokémon will also steal anything that it wants and take it back to its dwelling. It has been observed using its hammer like a bed to sleep on.
Tinkaton is the only known Pokémon capable of learning the move Gigaton Hammer.
Given its type combination and its size, Tinkaton may be inspired by duendes, gnomes, or dwarfs, the latter of which are commonly depicted smithing and using iron tools and weapons. Its habit of specifically interfering with Flying-type Pokémon calls to mind gremlins.
Tinkaton's petite stature and female-only gender ratio in contrast with its massive hammer may reference common media depictions of small and seemingly innocent looking girls with gigantic weapons.
Tinkaton may be a combination of tinker (itinerant tinsmith) and ton or gigaton.
Dekanuchan may be a combination of でかい dekai (huge), 鍛冶 kanuchi (blacksmith), and the Japanese diminutive suffix ～ちゃん -chan.