I'm not sure but i think you get it by completing an mission
You can find one in blue rescue team by going to Lightning Field then go to the place to evolve with the stone.
purity forest
In blue or red, it's in fiery field.
BY ****ING YOUR DS
you have to find a dungeon kecleon shop
You may get fire stones from the 29th floor of the dungeon Fiery Field.
you can't.its impossible.EDIT: Wrong. You can find a leaf stone as a random prize in paradise or in the DLC dungeon "Skill Treasury"
You can't.
you need a water stone
Red/ Blue: Northwind Great Land 29F
In Pokémon Mysery Dungeon: Blue Rescue Team, you can find Cyndaquil in the Blue Rescue dungeon that is called the Joyous Tower dungeon and you will be able to find it on Floor 13, Floor 14, Floor 15, Floor 16 and Floor 17.
Go to northern field where suicune is at.