To get Vessel in Jump Showdown (the JSD side of the Jujutsu Shenanigans x Jump Showdown collab), you need to use the knife event in the JJS map and earn a specific badge, which then unlocks Vessel as a playable character in Jump Showdown.

How to get Vessel in Jump Showdown

Follow these steps:

  1. Join Jujutsu Shenanigans (JJS), not Jump Showdown first
    • Enter the JJS game and head to the train station area where there are several portals.
  1. Find and pick up the special knife
    • Near the portals in the train station, a unique knife item can spawn on the ground.
 * If the knife is there, pick it up.
 * If it is _not_ there, it usually means someone already picked it up and has become the **boss** (Ka/Chara-style boss).
  1. Become or defeat the boss to get the knife
    • If you pick up the knife, you transform into the boss form automatically.
 * If someone else is already the boss, you have to **team up with other players and defeat that boss** ; the knife will drop and you can pick it up to become the boss next.
  1. Get a kill while in boss form
    • Once you are the boss (after picking up the knife), you must kill at least one player using that form.
 * When you successfully kill someone as the boss, you receive a **badge/achievement** tied to this collab event.
  1. Unlock Vessel in Jump Showdown
    • After you get that badge for killing someone as the boss with the knife, Vessel (Yuji/Shinjuku Yuji style) is automatically unlocked as a playable character in Jump Showdown.
 * You can then join Jump Showdown and select/use Vessel normally.

In short: play JJS, grab the knife in the train station, become the boss, get one kill, earn the badge, and Vessel unlocks in Jump Showdown.

Tips and practical notes

  • Public server required
    • The guide and showcases emphasize doing this in a public server , since other players need to be present to fight you or the boss and for you to secure a kill.
  • If knife is missing
    • Check if a boss is already active near the train station. If so, help kill them so you can grab the knife next time it drops.
  • Only one kill needed
    • You do not need a streak; one confirmed kill as the boss is enough to trigger the badge and unlock Vessel.

Mini FAQ

Q: Do I have to do anything special after the kill?
No. Once you get the kill in boss form, the badge should pop and Vessel becomes available in your Jump Showdown roster automatically.

Q: Is this time-limited?
The update notes and videos mention the collab as a limited-type event , but as of late February 2026 the method is still being demonstrated as working. Exact end date may change with future patches.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.