You have two options. You can either find the Attack on Titan 2: Final Battle NSP (which is the easiest, all-in-one solution) or you can find the base Attack on Titan 2 NSP plus the massive Final Battle DLC/Update pack.
From the Switch home menu, Attack on Titan 2 should now show version 1.0.6 in the title bar. Access the "Garage" or "Another Mode" to see unlocked DLC costumes and missions. attack on titan 2 switch nsp update dlc
| DLC Name | Content Type | Worth It? | | :--- | :--- | :--- | | | Massive Expansion (Adds 2 arcs, 8 new characters like Kenny & Zeke) | Absolutely Yes | | Additional Episodes: Bertholdt & Ymir | Side Stories | Yes (Lore rich) | | Weapon: Ultimate Worn Blade | Gear | No (Outclassed by late-game gear) | You have two options