Nothing in Pokemon is EVER too much. Remembering the names is at your own discretion. You remember the names from usage of Pokemon. In teams or in Battles. Or in annoying capture moments. It's overwhelming, but that means if someone knows Older Pokemon, that means they have played it longer.
Onto DLC. Using DLC to Pokemon games, sure I can like that. But using DLC to add a new Generation of Pokemon to an Previous Generation game, It's NOT gonna work for me, for anyone and for the Pokemon Market. DLC for additional storyline, areas and easy-more accessible Wild Pokemon I can accept.
Before I start my opinions, or onions, let me say something about Pokemon. Pokemon's Overall, main theme, is obvious. In English It's Gotta Catch em All. In Japanese, it's Get all of them. Collections. Collecting. Looking at each generation from III onward proves this. Games from gen I and II had problems with transferring pokemon and the game mechanics in them are simple. Remakes of Gen I games and the release of Ruby and Sapphire levelled the playing field.
A New Generation Means a new game, which means a New beginning. Getting that particular game means a brand new start to a new game. I treat it differently than Mario or Zelda. The gameplay is repetitive. I could say the same for Mario and Zelda. The only differences is the feel and the level and structure design of each level or dungeon or town or area to challenge the player in new ways.
In mario, same old 2D platforming, you reach the end of the level to reach the next one.
In Zelda, you fight begin the story slow, learn the story, find some sort of magic relic, information or someone special, find a dungeon, beat the boss, find a piece of relic, get updated on your new goal, rinse and repeat a few times, then use the info you have so far to again find a number of items that could beat the repetitive antagonist in your way till you reach the final boss.
In Pokemon, you are always treated like a new beginner. Beating the story is easy. Getting all Pokemon is up to you, a daunting quest that you can either disregard or not. Battling is another aspect of Pokemon. With Nintendo Wifi-Battles are limitless with endless amounts of Strategies.