This is simple, combine to Pokemon, and give them a Fusion name!
Here's mine!
Mewtina: Mewtwo + Garatina.
Stats:
HP: 2,000.
Abilities: Warp threw dimensions, +1 HP point per second. Increased durability per 2 seconds.
What he looks like: Mewtwo's upper body, coloured like Garatina. Garatina's...