Here's a full list for everyone:
1,280
Magikarp
2,560
Pichu
Cleffa
Igglybuff
Togepi
Marill
Azurill
3,840
Caterpie
Weedle
Pidgey
Rattata
Spearow
Zubat
Geodude
Sentret
Hoothoot
Ledyba
Spinarak
Poochyena
Zigzagoon
Wurmple
Lotad
Seedot
Taillow
Surskit
Shroomish
Slakoth
Nincada
Skitty
Volbeat/Illumise
Spinda
Corphish
5,120
Everything else
6,400
Onix
Mr. Mime
Scyther
Pinsir
Misdreavus
Heracross
Mantine
Skarmory
Tyrogue
Smoochum
Elekid
Magby
Sableye
Lunatone
Solrock
Castform
Shuppet
Duskull
Tropius
Chimecho
Absol
7,680
Omanyte
Kabuto
Lileep
Anorith
8,960
Eevee
Aerodactyl
Aron
10,240
Chansey
Lapras
Snorlax
Dratini
Larvitar
Wailmer
Relicanth
Bagon
Beldum
So Magikarp and most of the Babies are the quickest.