A Pokémon based on a wheel could be a Steel/Electric-type. Its name could be Rotavolt or Wheelspin.

Appearance: Its body would be primarily a large, metallic wheel with various gears and cogs visible. The central hub could be its head, perhaps with small, glowing eyes and a mouth that resembles a gear. Smaller wheels or sprockets could act as limbs, allowing it to roll at high speeds. Sparks could emanate from its body as it moves, emphasizing its Electric typing. Its color scheme could be primarily metallic grey and silver, with accents of electric blue or yellow. The wheel could have intricate designs etched into its surface. It might have a trail of sparks or energy behind it when it moves quickly.

Abilities:

• Static: A standard Electric-type ability, increasing the chance of inflicting paralysis on contact.
• Iron Barbs/Rough Skin: A Steel-type ability that damages opponents upon contact. This fits the wheel's potentially sharp edges.
• Motor Drive: (Hidden Ability) Boosts the Pokémon's Speed when hit by an Electric-type move. This reflects the wheel's potential for rapid movement.

Stats:

• HP: Relatively low, reflecting its potentially fragile construction.
• Attack: Moderate, capable of dealing decent physical damage.
• Defense: High, due to its metallic body and wheel-like structure.
• Special Attack: Moderate, reflecting its Electric-type attacks.
• Special Defense: Moderate.
• Speed: High, reflecting its ability to roll quickly.

Moves:

• Volt Tackle: A powerful Electric-type physical move.
• Iron Head: A Steel-type physical move with a chance to cause flinching.
• Spikes: A move that lays down spikes on the field, damaging opponents who switch in.
• Gyro Ball: A Steel-type physical move whose power increases based on the user's Speed compared to the opponent's.
• Wild Charge: A powerful Electric-type physical move with recoil damage.
• Rollout: A Rock-type move that increases in power with each consecutive use. This would be thematic for a wheel-based Pokémon.

Lore/Background: Rotavolt is said to be formed from discarded machinery and scrap metal, energized by a powerful surge of electricity. They are found near industrial areas and power plants, often rolling at incredible speeds. Their movements are precise and calculated, making them surprisingly agile despite their size. They are known for their powerful electric attacks and their ability to withstand significant damage.