>>12537616The way the games are "balanced" there are some teams that are just vastly superior to practically any other combination.
You might think that with each successive gen there would be more pokemon and therefore a greater chance for variety, but the opposite is now true.
Only a few pokemon from each gen rank in the upper tiers, and with each gen we get a few new juggernauts who simply stand out. This leads to a situation where competitive teams can only choose from those few incredibly strong pokes.
For example, in Gen 1 Golem, Rhydon, and Onix were all viable Rock types that had their niche and could be found regularly on a variety of teams. After Gen 2, Onix and Golem became obsolete because Tyranitar and Steelix joined the game. Rhydon saw a reduced or non-existent role as well because Tyranitar could do anything Rhydon did, but better. Immunity to Psychic was way more important that immunity to Electric, especially after the nightmare that was Psychic dominance in Gen 1.
Similar stuff started to happen in each concurrent gen. Monsters like Salamence, Electivire, Ferrothorn, and the like come in and do everything a previous mon did, but better.
Abilities and egg moves helped a bit, but GF wound up letting a small subset of pokes get great stats and great moves, whilst leaving others with great stats and no moves, or crappy stats that can't support their strong movesets.
I'm not necessarily blamin GF, it's really hard to balance a game properly. An unfortunate by-product of that is that when a balance issue rears its head, we get crazy centralization.
At this point it would take full-on reworks and overhauls to basic mechanics to make some pokes viable, even if they were commonly used a generation or two ago.
