Limit for spawns is 30mph apparently
I read something today about what we should "save" for gen 2 candy wise. Just sharing incase useful.
Porygon
Chansey
Seaking
Zubat (flappy fucker)
Polywag
Horsea
Oddish
Slowpoke
Onix
Scyther
I think I'll slow down on evolving these at present for candy. Who knows if it'll be of any use. I've lost my pokemon mojo.