So I thought, a discussion about the most forgettable Gen 1 Pokémon was a really cool idea. Let´s cover Gen 2 as well!
Right off the bat, I think Gen 2 has the highest percentage forgettable Pokémon of any generation. Don´t get me wrong, I love Gen 2 (it´s my favorite even), but Pokémon like Smeargle, Mantine and Magcargo just don´t tend to ring a lot of bells. And all this in a Gen with only 100 Pokémon.
I´m gonna go with Hitmontop. A lot of people seem to outright forget that it´s not just Hitmonchan and Hitmonlee. That says a lot.
It is indeed, and for me it is very memorable (as for other people who have played the VG), but a lot of people who like Pokémon don´t play competitively, yet they will still know, for example, Pichu. They won´t know Smeargle (or Magcargo).
I like the Ariados line! Gen II is awesome, but I think Stantler, Gligar, and Yanma (basically, most of the non-evolution pokemon at that time) probably don’t get much love. At least some got evolutions later, but some (like Stantler) have been left behind.