Where did you find that Ghostly Bagon and Ghostly & Dark versions sound cool though I haven't come across any course I just been playing like a half hour. And ya I rather be playing my game to lol.
You just find those at random while walking around. You also have Shiny, Metallic, Dark, etc. Pokemon. I myself have a ghostly Zubat and a metallic Whismur...
Other things I noticed that are weird about Pokemon Crater:
-Sometimes, moves that are normally more powerful than other moves are actually less powerful there. For example, normally Ice Beam does more damage than Aurora Beam. But in Pokemon Crater, Aurora Beam does more damage than Ice Beam. Weird...
-A Pokemon gains experience eve if it faints in a battle. That probably makes up for you being unable to switch...
-There is a long list of different attacks you can teach to a Pokemon for a price. All these attacks are compatible with every Pokemon. So you can have a Bellossom with Flamethrower, a Pikachu with Crabhammer, a Magikarp with Karate Chop... you get the idea.
-You have a bunch of new attacks there that don't appear in the games, such as Shell Attack and Hydro Blast.
-Pokemon evolve by either leveling up or using stones. So Seadra evolves at level 56 or so instead of being traded.
-All status problems (paralysis, freezing, confusion, and sleep) do the same thing--they prevent the foe from attacking for two turns.
-There is a new status called Scared that only ghostly Pokemon can inflict on others.
-If more than one Pokemon participates in a battle, they don't split the experience points--they all gain whatever amount it is, no matter how many Pokemon battled.
By the way, I'm Yamiko Murakage on Pokemon Crater. I have two badges and a team of level 30 Pokemon (Raichu, Combusken, Gardevoir, Shuppet, Bellossom, and Octillery).