Not an artist but I just keyboard smashed and made a random scribble and worked up from there
>Ajosubeel, the Seaweed Pokemon
>Water/Grass
>BST: 325
>HP: 55
>Atk: 80
>Def: 35
>SpA: 35
>SpD: 65
>Spe: 55
>Abilities: Weak Armor, Swift Swim, Chlorophyll (HA)
>It buries beneath the seafloor to disguise itself as seaweed. This disguise lures Pokemon over, where it can then attack its prey. It attacks using both its horn and sharp tail.
>Its tough, rubbery skin has a weak point beneath its stomach, marked by an X-like symbol. When attacking Ajosubeel, remember that "X marks the spot".
>Ficnikeel, the Abyssal Pokemon
>Water/Grass
>BST: 510
>HP: 90
>Atk: 125
>Def: 65
>SpA: 55
>SpD: 105
>Spe: 70
>Abilities: Weak Armor, Swift Swim, Intimidate (HA)
>This Pokemon resides in the lowest depths of the ocean, adapting darker colors to better resemble deep sea plantation, which it uses to attract prey along with its bioluminescent horn and eyes.
>Its underside features numerous X-like markings in order to fool predators. Only one of the X-like symbols serves as its actual weak point, detonated by its unique color.