Do the overall base stats of all Pokemon increase each generation?

Question

I ask this because many higher generation Pokemon stats can surpass them.

Answer 1

Yeah, they usually do, even if it's just a little bit. For example, in 5th gen many very powerful Pokemon were released that surpassed the power of many Pokemon before them, such as Haxorus and Ferrothorn. And in 6th gen Megas were introduced, no explanation needed.