List of online tournaments in Mario Tennis Aces
This is a list of online tournaments in Mario Tennis Aces. The game holds monthly online tournaments, in which players need to advance through a number of matches (rounds) against other human opponents and beat the finals in order to win a championship. Depending on the degree of participation in these online tournaments, the player can earn various prizes, such as new playable characters and costumes.
The following is a list of all online tournaments hosted from the release of the first demo up until now, along with the participation prizes handed out in each.
Pre-launch demo (May 2018)
Prior to Mario Tennis Aces's release date, a free demo was released on Nintendo eShop, including a limited-time online tournament. Characters could be unlocked for use in this demo by accumulating participation points. The Mario overalls costume could also be unlocked for the full game by completing one online match.
| Tournament date | Participation bonuses | |||||
|---|---|---|---|---|---|---|
| 0 points | 100 points | 300 points | 600 points | 1000 points | 1500 points | |
| May 2018 |  Mario overalls costume (only usable in the full game) |
 Waluigi |
 Toad |
 Spike |
 Rosalina |
 Chain Chomp |
June 2018 - November 2018
In these months, each tournament consisted of three preliminary rounds, followed by semifinals and finals. The player could only choose to play in Standard or Simple modes, both encompassed by the Singles class. The only participation bonus in every tournament (except for the June tournament) was a new playable character, which was unlocked by simply playing at least one round in the tournament.
| Tournament date | Participation bonus |
|---|---|
| June 2018 | N/A |
| July 2018 |  Koopa Troopa |
| August 2018 |  Blooper |
| September 2018 |  Diddy Kong |
| October 2018 |  Birdo |
| November 2018 |  Koopa Paratroopa |
December 2018
As of December 2018, the tournaments have been reduced to only one preliminary round, followed by semifinals and finals, similarly to the COM tournaments. This tournament also added the Doubles class among the already-existent Standard and Simple classes. Exclusively in this tournament, the player could earn different participation bonuses depending on the class played.
| Tournament date | Participation bonuses | |
|---|---|---|
| December 2018 |  Petey Piranha (Standard Class or Simple Class) |
 Shy Guy (Doubles Class) |
January 2019 - July 2019
The January 2019 tournament introduced Participation Points, which are earned in accordance to the player's performance in a match. By earning enough Participation Points in a tournament, the player unlocked new alternate costumes for certain playable characters. New playable characters were still awarded by simply playing at least one match in a tournament.
| Tournament date | Participation bonuses | ||||
|---|---|---|---|---|---|
| 0 points | 300 points | 500 points | 1000 points | 2000 points | |
| January 2019 |  Luma |
N/A | Mario overalls costume |
N/A |  Luigi overalls costume |
| February 2019 |  Boom Boom |
N/A | N/A | N/A |  Toad tennis outfit |
| March 2019 |  Pauline |
 Chain Chomp white and yellow cap |
N/A |  Chain Chomp white and red cap |
 Chain Chomp white and green cap |
| April 2019 |  Kamek |
 Spike blue headband and blue wristband |
N/A |  Spike pink headband and pink wristband |
 Spike yellow headband and yellow wristband |
| May 2019 |  Dry Bones |
N/A | N/A | Toad tennis outfit |
 Toadette tennis outfit |
| June 2019 |  Fire Piranha Plant |
N/A | N/A |  Bowser tennis outfit |
N/A |
| July 2019 |  Dry Bowser |
N/A |  Wario overalls costume |
 Waluigi overalls costume |
N/A |
Special demo (April 2019 - May 2019)
Another demo was released on Nintendo eShop in April 2019. This demo was similar to the previous demo, although characters were unlocked by playing a set number of matches, rather than by accumulating participation points. These matches could be played either in or out of the limited-time tournament to unlock the rewards. The Mario overalls costume, once unlocked, could be used in both this demo and the full game.
| Tournament date | Participation bonuses | |||||
|---|---|---|---|---|---|---|
| 1 match | 3 matches | 6 matches | 9 matches | 12 matches | 15 matches | |
| April 2019 - May 2019 | Mario overalls costume |
Waluigi |
 Daisy |
 Diddy Kong |
Chain Chomp |
 Luma |
August 2019 - current
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With the addition of Dry Bowser through the July 2019 online tournament, all playable characters are available in Mario Tennis Aces. Therefore, characters are no longer available as participation bonuses. However, costumes can still be unlocked with Participation Points. Following the August 2019 online tournament, alternate costume rewards from previous online tournaments (January 2019 - August 2019) appear in a monthly sequence.
| Tournament date | Participation bonuses | ||||
|---|---|---|---|---|---|
| 250 points | 500 points | 750 points | 1000 points | ||
| August 2019 | Koopa Troopa blue shell and blue shoes | Koopa Paratroopa blue shell and blue shoes | Koopa Troopa red shell and red shoes | Koopa Paratroopa green shell and green shoes | |
| September 2019 | N/A | Mario overalls costume |
N/A | Luigi overalls costume | |
| October 2019 | Chain Chomp white and yellow cap |
Chain Chomp white and red cap |
N/A | Chain Chomp white and green cap | |
