it is in between Mahogany town and Ekruteak city
Use a action replay
East of Ectearuck city
Go west of Mahogany town.
When you enter ecruteak city go left until you find an entrance for mt mortar [But you need one of your Pokemon to know flash if you want to enter mt mortar]
the third gym's HM is Strength. Receive from the Hiker who comes out of Mt. Mortar on Route 42
Mt. Mortar after winning at Blackthorn Gym. You will need a Pokemon that knows waterfall and an open space in your party because he will give you a Tyrogue after you beat him in a Pokemon battle.
no
mt. mortar you have to have a certain trainer in tour pokegear that will tell you or just keep looking
After Mount Mortar, Suicune will travel to Kanto where you will see it Vermillion City shortly after you arrive on the SS Aqua.
Start from Ecruteak City and go to the right and out of the city to Mt. Mortar!
No, only when there is a event for deoxis
MT. MORTAR is by Ecurteak City. Go to the right of Ecruteak City and you will eventually reach it.