Meet Cosmo the Yooyu/Staryu, He's Merc's Pet/Petpet.
I made Cosmos in my style using Anime Studio 11

Colour: Xmas

Elemental Power: Air

Clothing: Holly Decoration

Personality: Sunny

Friends: Casper the Elyllie, Andy the Guppy, Tomby the Ghost, Nova the Galaxy Elyllie, Lyle the Birthday Faellie and Royalblue Tentacle

Family: Merc Otter/Lutari(his owner)

Likes: Petpet Battledome, Sports

Dislikes/Hates: Turmaculus and Petpet Lab Ray

Cosmo © Makatoons (No Stealing!)
Yooyu species © Neopets and JumpStart