We literally had a favorite pokemon poll in 2019 before SWSH unironically ruined the series

Full results are here: https://docs.google.com/spreadsheets/d/17ne51l0NkIqdRPzsV0r50Iut8et8Hc7_GCcSeY30XTk/edit?usp=sharing

Out of 821 eligible Pokemon, 200 of them got 0 votes and 156 of them only got 1.

The top 10 is:
Volcarona (63)
Aggron (46)
Gardevoir (42)
Metagross (42)
Flygon (40)
Scizor (39)
Tyranitar (37)
Garchomp (37)
Umbreon (34)
Torterra (33)

Here's how many votes each gen got, and the average votes for each Pokemon of that gen. Gen 3 ended up getting the most votes, but Gen 2 has the best votes to Pokemon ratio.
>Gen 1
674 --- 4.46
>Gen 2
634 --- 6.34
>Gen 3
724 --- 5.36
>Gen 4
627 --- 5.85
>Gen 5
597 --- 3.83
>Gen 6
263 --- 3.65
>Gen 7
272 --- 3.10

Additionally, here's the Top 5 for each Gen (except 8):

>Gen 1
Raichu
Arcanine
Gengar
Charizard, Ninetales, Vaporeon (Tie)

>Gen 2
Scizor
Tyranitar
Umbreon
Heracross
Typhlosion

>Gen 3
Aggron
Gardevoir, Metagross (Tie)
Flygon
Swampert

>Gen 4
Garchomp
Torterra
Empoleon
Togekiss
Gliscor

>Gen 5
Volcarona
Galvantula
Chandelure
Golurk
Hydreigon

>Gen 6
Tyrantrum
Sylveon
Greninja, Aegislash (Tie)
Noivern

>Gen 7
Mimikyu
Golisopod
Primarina
Incineroar
Bewear