Green_Hilltop: I don't have a 3DS, so I haven't played the 6th gen, I was talking about 4/5.
Sorry, I misunderstood you there. I though you were talking about reasons why the 6th gen games didn't interest you.
Green_Hilltop: I don't care about IVs, especially in the first two generations as most Pokemon you caught were great, I was talking about EV. I hate the EV system, and this is a new thing - could you go through a cave with only Geodudes and get 0s in practically all your stats because of it? No.
Pomeg/Kelpsy/Qualot/Hondew/Grepa/Tomato berries have existed ever since the current EV system was introduced (generation 3), so you can easily remove unwanted EV's and retrain them later. For competitive play you need your EV's (particularly speed) to be exact, but for casual play you can usually just get away with letting them grow naturally and flushing out unwanted EV's with berries.
While the EV system from generation 1 and 2 worked differently and you couldn't accidentally give your pokemon bad distributions, it also took
a lot more grinding to max out.
That's why I mentioned it in connection to the Zebramon - you have to go and fight against specific Pokemon just to raise your stats in a desired way (eg. raise its defense)
EV's aren't miracle workers. They can't turn a slow lumbering monster into a speedy attacker, and they can't turn a glass cannon like Zebstrika into a tank. Zebstrika is just plain fragile no matter how you raise it. Pokemon like this have
always been shoe-horned into glass cannon roles.
For the purposes of casual play, I have to fundamentally disagree with you. I've done things like "solo Butterfree run", with nothing more than scumming for a modest-natured Caterpie and scarfing down kelpsy berries to remove unwanted attack EV's. The singleplayer game is designed for kids, there's plenty of room to use sub-optimal pokemon and still rock out. In multiplayer... well, you want every advantage you can get and that's a different matter.
you really have to look for the right combination of its abilities and starting stats if, like me, you couldn't check the IV since I have the real game and it's not on a flashcart.
You can figure out the range of possible IV's from those starting stats. There are plenty of online tools available to do it. If you actually care about "perfect", there's an NPC in every game who will "rate" your pokemon and will remark about any stat in which they have perfect IV's.