You can catch Larvitar... LeafGreen or FireRed - Seven Island - You can go here after beating the elite four and finding either the Ruby or Sapphire depending on if it is LeafeGreen or FireRed. - Seavault Canyon. Pearl and Diamond it can be found on route 207 using the Pokerader - obtainable after beating the elite four from Proffessor Oak. Ruby/Sapphire/Emerald - Can't be obtained unless traded from LeafGreen or FireRed.
to find larvitar go to the Seavault Canyon
Go to Route 207 and use Pokédar. Larvitar will be rare.
To get Larvitar, you can either go to a certain area of the Safari Zone (where they are extremely rare), or you can go to Mt. Silver and try to find one there (they are still rare).
first go to seven island and then go down the bridge
After obtaining the national dex go to Dawn or Lucas to get the poke radar then go to route 207 then use the poke radar then there might be a chance getting a larvitar.(Only in pokemon diamond)
Larvitar can be found in Mt.Silver.
After you beat the elite four and get your national poke'dex every day go to dawn's sister and in time she will tell you where to get a larvitar, catch a larvitar then evolve it into a pupitar then tyranitar.
A ditto
First, you MUST have 10 credits. You have to go to the link that says My Pokemon, then look for the link that says Spend Your Credits. Go down and look for Larvitar, click on him and trade your 10 credits for him.
Larvitar evolves to Pupitar at level 30.
Larvitar evolves into pupitar at level 30
You can't know when it is Larvitar. But, at my research i have found it that a Larvitar appears 2 of 10 times you radar on.