VIVA LA DARKNESS!!!
Hi. Here a little intro...
Username: rom hunter
What I think of Dark-Type Pokemon: Coolest! Though I would say same for Grass type.
My partners: Umbreon, Darkrai
Answer to the current topic: Amongst the generations, which has the best Dark-types introduced?
Let me answer statistically.
First I choose best (= my favorite) dark types: Umbreon, Mightyena, Absol, Skuntank, Drapion, Darkrai, Liepard
Now lets see which gen has got how many.
Gen 2: Umbreon
Gen 3: Mightyena, Absol
Gen 4: Skuntank, Drapion
Gen 5: Darkrai, Liepard
So its tie between Gen 3,4,5. Now considering the remaining pokemon it is tough choice between Hoenn & Unova. I will add Nuzleaf (Gen 3), Crawdaunt (Gen3), Scrafty (Gen 5) to the set. I know I've left out some powerful pokemon such as Tyranitar & Hydreigon but that is considering factors such as their availability, evolution levels, mixed type disadvantage etc.
So clearly, for me, Gen 3 is the winner. (If it hadn't been for Darkrai I won't have even given a thought to Gen 5)