Melonyan is a melon-themed cat with rich green coloring and lines of pale green all over its body. Most of its face is pale green with gold coloring in the center - matching its inner-ear, chest, and paw tips. Its eyes are black and it's nose peach. At the center of its head rests a Melon stem. A gold and green-themed band is around Melonyan's stomach, while a thin collar holds a rich orange sphere, which matches the flames on its tails.
Befriended:"You have a discerning eye, nya! Let's be friends, nya!"
Befriended (Yo-kai Watch: Wibble Wobble):"I'll be friends with you, if you take me shopping."
Being traded: "From farm to friend! Nya!"
Receiving food (favourite): "This is it, nyeah!"
Receiving food (normal): "*chew*"
Receiving food (disliked): "Nyasty..."
Freed from the Crank-a-kai: "Thank you for freeing me, the nyicest fruit in town!"
His name is a combination of the word Melon and nyan, the sound a cat makes.
Melonyan makes several references to being "expensive," both in his Medallium entry and in his catchphrase. This is because in Japan, cantaloupe melons are extremely expensive, going for around ¥4,000 each, which in USD is roughly $36.28.