Route 201 in Platinum

This location contains the following Pokemon:

Grass or cave interior

Pokemon	Morning		Day		Evening
Bidoof	2-3	40%	2-3	50%	2-3	50%
Starly	2-3	50%	2-3	50%
Kricketot	2-3	10%			2-3	10%

Swarms

Pokemon	Morning		Day		Evening
Doduo	2	40%	2	40%	2	40%
Bidoof	2-3	20%	2-3	30%	2-3	30%
Starly	2-3	30%	2-3	30%

Using the Pokeradar

Pokemon	Morning		Day		Evening
Nidoran (F)	3	6%	3	6%	3	6%
Nidoran (M)	2	6%	2	6%	2	6%
Bidoof	2-3	34%	2-3	44%	2-3	44%
Starly	2-3	44%	2-3	44%

FireRed in the GBA slot

Pokemon	Morning		Day		Evening
Growlithe	2	8%	2	8%	2	8%
Bidoof	2-3	36%	2-3	46%	2-3	46%
Starly	2-3	46%	2-3	46%