Here are a few of the latest Pokemon Go nest migrations for Singapore as of today, 18 May 2017.
Gen 2
Girafarig
Go to the Extreme Left side of Pasir Ris Park to farm this Pokemon.
Yanma
To farm some Yanma, go to the Central side of Pasir Ris Park.
As well, you can also go to the Tampines Eco-Green Park for this Pokemon.
Chikotira
For Chikorita, you can head on to Bedok Stadium in the East side of Singapore to farm it.
Remoraid
You can head to the Garden Hill Park to farm Remoraid.
Or else you can head to the National Service Resorts and Country Club near East Coast Park area, for this Pokemon as well.
Qwilfish
Go to East Coast Park Area D to catch and farm this Pokemon.
Shuckle
Head on to the Area G of East Coast park to catch Shuckles.
Teddiursa
For this cute teddy bear Pokemon, you can go to Bishan Ang Mo Kio Park.
Dunsparce
In order to farm this Pokemon you can go to the Chinese Garden in the West part of Singapore.
Sneasel
If you want to farm Sneasel, go to the Singapore Science Centre for the Pokemon.
Gen 1
Pikachu
Head to either Botanic Gardens or to Changi Beach to farm this cute electric mouse.
Charmander
Head to the Left hand side of Pasir Ris Park to farm Charmander.
Bellsprout
To farm this Pokemon, head on to Tampines Sun Plaza Park.
As well, you can also go to the Tanah Merah Country Club for this Pokemon.
Electabuzz
Go to East Coast Park area B to farm this Pokemon.
Growlithe
For this Pokemon, go to West Coast Park.
Machop
Head to the Singapore Orchid Country Club area at the Yishun Park to farm Machops.
Diglett
To farm this Pokemon, go to the Tampines Central Park.
Scyther
Go to Kent Ridge Park to farm Scyther.
Hi I want to know how to collect pokecoins in battles
http://www.ign.com/wikis/pokemon-go/How_to_Get_Coins