To get Suicune in Kanto, you have to see it in Johto first. See it in the cities/routes in the following order.
1. Burnt Tower
2. Cinnawood City
3. Route 42 (cut required)
4. Vermillion City
5. Route 12
6. Route 25
On Route 25, you can battle and capture Suicune.
Suicune,latias,latios sorry that all i got so far in my heart gold....
After Mount Mortar, Suicune will travel to Kanto where you will see it Vermillion City shortly after you arrive on the SS Aqua.
Throughout the storyline, you chase Suicune around Johto and after the Elite 4 abit in Kanto but it's final destination is at Route 25 outside Bills house in Kanto just near Cerulean City (One you have beat Misty)
go to the kanto region to route 14 where the wind mills are and suicune will be on the lake and then it will be at cerulean cape where misty was
johto and kanto
Johto and kanto
they are not found in the tower entei and raikou are roaming and suicune you get in kanto
Kanto is confirmed to be in HeartGold and SoulSilver.
because there is no underground in Kanto
Route 1 in Kanto
with a lot of luck
Yes it is hard but do able