If you picked this pokemon up in Black stream Factory it won't be here you can only get one ditto in game
Roggenrola
3 Red
Used For Quest Later
Heavy Slam
Curse
Magnitude
Abra
8 Purple Shards
Psychic Terrain
Encore
Stolen Pokemon
2 Blue
Must have completed quest parts leading up to it. get stolen again
Pokemon Psychology
A man inside the Pokemon Psychology can change the nature of the player's Pokemon for the cost of three Heart Scales.
Aether Foundation
You can find an alley in 7th Street. there you will find scientists working on a project. after defeating one of them. you have a choice to help them. they will require collecting specific Pokemons for their new creation. after you finish the entire quest, you will battle Type: Null and chose whether or not to capture it. It will be level 50, its recommended you use a tanky ghost type so it can be immune to its normal type attacks. Because it will use Take-Down and kill itself if you're trying to catch it.
Pokemon needed:
Carvana: can be found in Lapis Ward (Post Restoration, Good Rod. Or by using the Good Rod at the Aqua Gang hideout, you also get given one if you join them)
Unfezant: can be found in Ionia Valley (High levels there, so its easy to go straight to unfezant)
Luxray: can be found in Corner (5000 coin reward, this part is the most annoying, unless you have 100,000 poke dollars on standby to buy game tokens instead)
(it is recommended you breed the Shinx if you're doing it early. since you obtained it from the game corner)
After you gain fly by defeating Ciel , you can return to 7th street and the gate blocking the stairs behind the recovery machine will be open. It will lead you back to the Water Treatment center. It will lead you in the room Taka locked after you decided to battle/not battle him. In said room is located TM58 Sky Drop and provides a shortcut back.
"Rare Habit"
To the right side of 7 street theres a dude wanting one of those "Rare candies". he will trade you a Piplup (With moves Icy Wind and Agility) if you give him one.