Glaspike + Botrioy, Mechammoth/Behemoth

Glaspike (Duskull+Feebas): The first Pokemon to be genetically created. Glaspikes are water types as well and can use water based attacks. They have no eyes yet are able to find their way. Their bodies are also transluscent, allowing others to see their organs. Despite their frightening appearance, if Glaspike stumbles upon danger, it will only show its teeth, as a message to stay back. If the attacker persists, then Glaspike will fight, using its mighty teeth as weapons, as well as other attacks.
 
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Botrioy (Phanpy+Rhyhorn): These slow pokemon have a hard time getting to their food at the right time. So moss grows on their back, allowing them to feed on the way. Its trunk is extremely powerful. One swing is said to be able to break every bone is a human's body.
Botrioy can evolve into 2 different Pokemon:
 
Mechammoth (Donphan+Metagross): Their body is full of magnetic marbles that can be tranfered to one part of the body to another. Mechammoth on its own can choose its weaknesses and strengths (more power in the legs, less in the trunk for example). Its joints make an uncomfortable squeeze sound that deceives opponents.
 
Behemoth (Donphan+Spiritomb): It's appearance of a living corpse gave it the name of the most frightening pokemon ever discovered (most humans don't know anything about Giovanni's Genetic Experiments). It surrounds its opponent with the dark cloud from its body, making them feel vulnerable. And then it charges.