>>24911604When you watch the anime is more easy fo find the mons less forgettable, this is why people think that Gen 1 is "memorable", because most of the fans started pokémon watching the anime at the beginning, then dropped it later, and now they say that later mons are not memorable, because all that they saw of the new ones was some random npc using it, and then they OHKOing.
This is even more true if the mon is not good in the competitive.