Half the advice on how to unlock character in super smash bros ultimate describes a condition that was true two updates ago. The current one is simpler than the folklore around it.
Achievements and in-game unlocks sometimes track separately and disagree with each other. The game usually confirms this in a menu you have no reason to open.
The one-paragraph version
If it has not appeared, the requirement is almost certainly incomplete rather than broken.
If the unlock does not appear
Anything gated behind a seasonal event genuinely can expire, unlike most unlocks. The official documentation is right more often than forum consensus, though it is rarely as clear. Progress made before starting the relevant quest sometimes does not count, which catches people out.
The reward being cosmetic does not make the requirement any less specific. If several people report different requirements, they are usually describing different versions.
What it changes once you have it
If something here stops matching what you see on screen, the game has probably changed a value in an update. The confirmation for how to unlock character in super smash bros ultimate appears somewhere most people never open. Community spreadsheets are more reliable than forum threads for this specific kind of question.
The requirement for how to unlock character in super smash bros ultimate is shorter than the folklore that has grown around it. Doing the condition for how to unlock character in super smash bros ultimate twice never helps, though several guides imply it does.
What the requirement actually is
If the item is account-wide, you only need to do this once ever. Keep expectations proportional to the effort — this is a solved problem, not a research project. Whether the unlock behind how to unlock character in super smash bros ultimate can be missed permanently is worth settling before you go any further. Doing the condition in co-op usually credits everyone, but not always the host differently.
- Sync or reload the cloud save before concluding it did not work.
- Do it on a focused run rather than mid-story.
- Try it solo if a co-op attempt did not register.
- Have a fallback plan for the step most likely to fail.
- Set aside enough time to finish, since stopping halfway causes most of the confusion.
- Map out any prerequisite unlock before starting.
Whether it can be missed permanently
If a step feels pointless, it is usually there to prevent a failure you have not hit yet. Some conditions only evaluate when you return to a hub area, which makes them look broken. Advice on how to unlock character in super smash bros ultimate is unusually unreliable because the requirement changed at some point. Where a counter is visible, trust it over any guide including this one.
Some unlocks check on load rather than continuously, so restarting is a real diagnostic step. The confirmation is easy to miss if it appears during a loading screen.
- Check the deadline first if it is seasonal.
- Back up your save if the game gives you the option.
- Check whether the requirement is per-character or account-wide.
- Restart the game once before assuming it failed.
- Keep a spare loadout for the attempts that go badly.
Where the time normally disappears
- Grinding general progress when the unlock needs one specific action.
- Copying someone else's setup without checking that it fits your situation.
- Following advice written for the version before the requirement changed.
- Checking the inventory instead of the collection screen and concluding it failed.
- Treating a comment thread as more current than the official notes.
Still unclear?
Can I do this on a new save?
Yes, and often faster, because the requirement usually sits early in progression rather than late.
Is any of this reversible?
Nearly all of it. Anything that is not is flagged in the steps, and there is normally a safer alternative worth considering first.
Can I do this with a friend?
Yes, and it is often easier. Agree on who does what before starting, because improvising halfway is where co-op attempts fall apart.
Does it count if I did it in co-op?
Normally yes for everyone involved, though a few games credit only the host. Repeating it solo is the reliable fallback.
The method above is deliberately unexciting, which is exactly why it keeps working.