Now I know this is going to sound unbelievable, but it's completely true. About 2-3 years ago a friend and I wanted to make a Pokemon hack using all fakemon that we would create ourselves (nothing ever came of it and he and I have since gone our separate ways, but that's besides the point here).
One of our ideas for a fossil pokemon? A rock/dragon type that was based on the T-rex. We even gave it a name, Terrex (terra for its rock-typing, rex for, well, T-rex). I think our other fossil was going to be an archeopteryx (hi there Archen/Archeops!).
Now if there's a jumping ant pokemon or a diamond-covered Torkoal evolution announced in the next CoroCoro I will be convinced* that Game Freak is syphoning ideas out of mine and my friend's heads. *Puts on tin foil hat and waits*
*not seriously