Kipupu, a Water/Dragon-type Pokémon from the Unova region (Generation V), could be envisioned in several ways. Here are a few possibilities, focusing on different aspects of design:

Option 1: The Serpentine Siren

• Appearance: A serpentine Pokémon, predominantly blue and teal, with shimmering scales. Its head resembles a stylized dragon's head, with sharp, pointed features and glowing turquoise eyes. It has long, flowing fins along its body that resemble seaweed or ribbons, and a long, elegant tail that ends in a fin resembling a crescent moon. It might have small, delicate forelimbs.

• Abilities: Torrent (Water-type ability), Adaptability (boosts the power of moves of the Pokémon's type), or Infiltrator (ignores the effects of substitutes).

• Stats: High Special Attack, decent Speed and HP, lower Defense and Attack.

• Moves: Water Pulse, Dragon Pulse, Hydro Pump, Ice Beam, Rain Dance, Dragon Tail, Scald, Aqua Tail.

Option 2: The Aquatic Leviathan

• Appearance: A large, powerful Pokémon resembling a whale or a sea serpent. Its body is primarily dark blue, almost black, with lighter blue underbelly. It has powerful fins and a large, powerful tail. It might have bioluminescent markings along its body.

• Abilities: Swift Swim (doubles Speed in rain), Water Absorb (heals from Water-type moves), or Multiscale (reduces damage from attacks when at full HP).

• Stats: High HP and Attack, decent Defense and Special Attack, lower Speed.

• Moves: Waterfall, Dragon Claw, Surf, Earthquake, Dive, Aqua Tail, Crunch, Body Slam.

Option 3: The Elusive Kelp Dragon

• Appearance: A smaller, more agile Pokémon resembling a sea dragon camouflaged with kelp and seaweed. Its body is primarily green and brown, blending in with its surroundings. It has long, flowing kelp-like appendages and sharp claws. Its eyes are hidden amongst the kelp.

• Abilities: Chlorophyll (doubles Speed in sunlight), Sniper (critical hits deal 1.5x damage), or Liquid Ooze (nullifies the effects of draining moves).

• Stats: High Speed and Special Attack, decent HP, lower Attack and Defense.

• Moves: Water Gun, Dragon Breath, Giga Drain, Hidden Power (Ice), Rain Dance, Dragon Pulse, Sludge Bomb, Agility.

Option 4: The Deep-Sea Guardian

• Appearance: A majestic Pokémon resembling a large, deep-sea creature with bioluminescent features. Its body is primarily dark blue or black, with glowing patterns of light blue and purple. It has large, expressive eyes and long, flowing fins.

• Abilities: Pressure (lowers the PP of the opponent's moves), Levitate (immunity to Ground-type moves), or Misty Surge (creates a Misty Terrain).

• Stats: High HP, Special Defense, and Special Attack, decent Defense, lower Attack and Speed.

• Moves: Scald, Dragon Pulse, Protect, Recover, Misty Terrain, Ice Beam, Surf, Signal Beam.

These are just a few examples. The specific design of Kipupu would depend on the desired aesthetic and gameplay role. Further details, such as its evolutionary line, Pokédex entry, and cry, could be added to flesh out the concept further.