Back to the Beginning
You'll have to travel through Assault of the Dreadnought to get back to Twilight Town and it can be a rough ride. Head to the Station Plaza then into the Underground Concourse via the door labeled "5". Head down and to the left a little bit to find a chest with an AP Boost (25/39) inside. You can spot Twilight #45 and Twilight #38 from this chest. Grab them both and leap to the south end. Open the chest here for an Orichalcum (24/39) then go back west to a chest up the steps with a Mythril Gem (23/39).
Now follow the signs pointing to "4" and you'll find a Mythril Crystal (26/39). Exit at the south end into the Tunnelway to find Twilight #31 and an Orichalcum (27/39) then head out to Sunset Terrace, collecting the Mythril Crystal (28/39) along the way. Jump on the trolley and onto the roof for Twilight #7 then leap across to an Orichalcum+ (29/39). Drop down to a chest near the tracks with a Mythril Crystal (31/39) then go to the northern alley for an AP Boost (32/39).
Head to the west side and use High Jump Lv2 and Aerial Dodge Lv2 to snag Twilight #8 near the waterfall. From the waterfall look east and you can spot a chest with a Mythril Shard (30/39) near the trolley. Continue up to Sunset Hill where you can easily obtain Twilight #2 and Twilight #13. Go back into the Underground Concourse and out exit 4 then through the Woods. At the Mansion you'll get a scene.
After talking to Hayner, Pence, and Olette you'll have to battle some Nobodies but King Mickey appears to help! Defeat all the Nobodies to clear the event and receive a bonus!
BONUS : HP +5 (Sora), Lucky Lucky (Donald), HP +5 (Goofy)
Head into the mansion and grab Dawn #32 then a Mythril Crystal (33/39). Check the left room for a Mythril Stone (37/39) and a Mythril Crystal (36/39) then head upstairs. Grab the Serenity Crystal (35/39) then enter the left room up here to find Twilight #24 and a save point. Return to the Foyer and check the right steps for a Mythril Stone (33/39) then head into the Library. Pick up the Orichalcum (38/39) and fight your way into the Computer Room.
After the scene head through to the Basement Corridor to find the Ultimate Recipe (39/39) and the Pod Room, which has Dawn #31 . Talk to Pence and tell him "Sea-Salt Ice Cream" then head to the "other" Twilight Town. You receive Secret Ansem's Report 10 after the scene, so head to the Basement Hall after grabbing Dawn #23 . Head into the dark aura and you'll have to face a bunch of Nobodies. You'll get the aid of an unexpected ally to clear this event.
BONUS : Slapshot (Sora)
After the scene you'll receive the Bond of Flame Keyblade and the true whereabouts of Kairi. You'll get another exclusive scene to the Final Mix as well.
A Taste of the Past
Complete the Twilight Town episodes.