The Ultimate Partnership (相棒とともに！ 最強コンビはどのファイター!?) was an Event Tourney with a theme of fighters that work as a team, whether they be a two-in-one character or interchangeable. It ran from 6 a.m. on September 6, 2019 to 6 a.m. on September 9, 2019 (UTC). During the event, only certain characters can be used.
Description
North America
- This time-limited tourney features fighters who work as a group. The further you advance, the better the spirit you'll win![1]
PAL regions
- This time-limited Tourney exclusively features fighters who work as a group. The further you advance, the better the spirit you'll win![2]
Rules
- Format: Smash
- Rules: Time
- Time Limit: 2:30
- FS Meter: On
- Items: Medium
Available fighters
The character selection screen for The Ultimate Partnership.
| Fighters | ||||
|---|---|---|---|---|
 Ice Climbers 
|
    Pokémon Trainer (Squirtle, Ivysaur, Charizard) 
| |||
 Olimar 
|
 Rosalina & Luma 
|
 Duck Hunt 
|
 Joker 
|
 Banjo & Kazooie 
|
Trivia
- With a total number of 7 available fighters, The Ultimate Partnership has the least amount of available fighters for an Event Tourney.
- If Pokémon Trainer's Pokémon are separated, then it is tied with The Next Big Super Star, with 9 fighters.
- Thus far, this is the only Online tourney with more than one downloadable fighter in it, having two, those being Joker and Banjo & Kazooie.