| Open Arena | |
|---|---|
| Dates | December 8th, 2018 |
| Venue | Coliseo La Tortuga |
| Address/City | Blanco Encalada 1142 Talcahuano, Chile 
|
| Attendance | 141 |
| Results | |
 winners
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MK~Iori
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| Staff | |
| Organizer(s) | Smash Bío-Bío, Redragon |
Open Arena was a Super Smash Bros. Ultimate regional held in Talcahuano, Chile on December 8th, 2018, a day after Ultimate's release. It became one of the first Ultimate tournaments to reach 100 entrants and remained the largest tournament in South American until Smash Chile - Civil War on July 13th, 2019; even still, the event remains one of the largest events in Chile and the eighth-largest Ultimate tournament in South America.
Results
Super Smash Bros. Ultimate singles
(141 entrants)
Top 16 Bracket
| Place | Name | Character(s) | Earnings |
|---|---|---|---|
| 1st | MK~IoRi |
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| 2nd | Myan |
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| 3rd | Sekai Doggo |
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| 4th | Satoshi Sora |
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| 5th* | Tales |
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| 5th* | Kross |
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| 7th | Polo |
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| 7th | tawan. |
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| 9th | Bratu |
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| 9th | Noire |
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| 9th | Rodnand |
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| 9th | BlueBlaze |
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| 13th | DioGamma |
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| 13th | GaBo |
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| 13th | SU Marlu |
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| 13th | Mylji |
*DQ'd in Losers.