you can get them in any dungeon because every dungeon is different
like this: pretend your friend has Dungeon A you will probably get dungeon B-Z there is a .1% chance that you will get the same exact dungeon as your friend
No, only joy seeds are available in Mystery dungeon Blue and Red
You can find the plain seeds in all the mystery dungeon games, you just have to look for them
you can only get max pure seeds with cheats.
wonder mail...
Sleep Seeds can be found in every dungeon in the game. They appear frequently too.
Over wondermail.
no
Lilac and Daffodil
Golden seeds level any Pokemon on your team by 5 levels but you can only eat them in a dungeon.
Link box and plenty of reviver seeds!
You should have some Reviver Seeds and some Status Seeds.
1. Sleep Seeds 2. Reviver Seeds 3. Dig 4. Mirror Move