I see, I was wrong. Sorry about that.
The black cat would be a dark type, the Slot a steel.
The slot would be a rectangular light blue prism, with square yellow eyes and a red clown nose. He would have two, graw, L shaped cranks for arms with little red balls on the end. His belly would have a screen on it with rows on it, the rows would move during animation. His legs would be gray, skinny cylinders with black thin lines through them, his feet would be red. The man who gives it to you will have built it, saying it was born from his two loves: pokemon and gambling! But then he'll tell you that his wife said his only love was her, so now he has to give it away. xD
It could evolve by item, called the Power Crank, and it would turn into a brown, skinny, tall pokemon. It would have a roulette table on its head like a sombrero. It would be dark/steel.
The black cat would have yellow eyes and stand on two legs. It would have a white diamond on its belly and three cards for a tail. It would also have three cards on it's forehead.
When evolved, it would have longer, rabbit like ears that hang down from under a top hat with three cards coming out of the rim. It would have long, metal claws on both its hands and feet. It would also be dark/steel.
The man would say "My love for gambling and pokemon is what drove me to catch this little guy." and then say the same thing about his wife.
...But that's my idea, I suppose it"s not really speculation. xD
I thought of it more as an Orca. Its in the dolphin family, but still, I would like to see a true lean mean dolphin pokemon fighting machine. Normal/water, it could be Bibarel's counterpart (haaa DPPt reference!)
Im getting the feeling that we might see a change up in the legendary line-up. Maybe get a bug-legendary for a change. Maybe a Dragonfly? bug/dragon since Vibrava has ground/dragon.
I don't think we'll have a bibarel counterpart. Bibarel was the new "Ratticate", but since it was a beaver they gave it water. A new dophin would work though. It could learn the move Hyper Voice. Dragonfly=Yanmega, a new pokemon. But I would love to see a bug legendary! I love bug types. I feel like they were sort of jokes as pokemon up until Sinnoh, with Yanmega and Vespiquen. I want to see bug types become more important.