Golduck and Miltank

Miltank
Appearance:
It's an adorable little pink bipedal cow with a plump, soft body that exudes warmth. It has a creamy yellow belly, large angular black spots on its back, long, floppy black ears with yellow interiors, huge, expressive blue eyes, a small pink triangular mark on its forehead, and two short horns. Its yellow udder with four pink teats is very distinctive (although in this Easter scene, it looks more like a loving "mother" than a source of milk). In the image, it's crawling/rolling around with that playful vibe, its black hooves and little tail ending in a ball, gazing at the egg with pure childlike wonder.
Personality (in this scene):
Miltank is pure maternal sweetness and positive energy. She's affectionate, cheerful, a little clumsy with enthusiasm (the kind who almost crushes an egg in her excitement at seeing it), and very generous. I'm sure that while she's searching for eggs, she's already thinking about sharing them with all her Pokémon friends or having a picnic with hot chocolate and her famous nutritious milk. She has that natural protective instinct: if Golduck gets too serious or competitive, she'll give it a playful lick or gently nudge it with her body to help it relax. She's the one who gets the most excited with each egg she finds, letting out little squeals of joy, and she's probably already planning how to decorate them or give them to the smaller Pokémon in the garden.

Golduck
Appearance:
It's a bright blue, bipedal Pokémon with a streamlined shape perfectly suited for swimming (it looks like a cross between a duck and a mythical platypus). It has intense red eyes that give it a mysterious and somewhat serious air, a light cream-colored beak, a bright red gem on its forehead (which sometimes flashes when it uses psychic powers or gets excited), and four backward-pointing crests on its head. Its hands and feet are webbed with light webbing between its toes, ideal for "swimming" through grass or rummaging through flowers. In the image, it's crouching in that duck-like pose, ready to peck, with its white claws and squinty eyes as if to say, "Where's next?"
Personality (in this scene):
Golduck is the more serious and focused of the two. He's very intelligent, a bit proud, and a perfectionist (after all, he evolved from a clumsy Psyduck and is now the king of the waters). In the egg hunt, he acts as the "strategist": he sniffs the air, uses his psychic intuition to detect where the most difficult eggs might be hidden, and sometimes frowns when Miltank gets too excited and almost steps on them. But deep down, he's protective and chivalrous; if he finds a particularly beautiful egg, he carefully lifts it using his telekinetic powers so as not to break it and shows it to Miltank with a sly little smile. He loves to win, so he's probably keeping mental tally of who finds the most.