From SmashWiki, the Super Smash Bros. wiki
Usage
{{Infobox Tournament
| name = <!-- Name of tournament -->
| image = <!-- Image to use, as "Filename.ext" -->
| imagesize = <!-- Size of image, Default is 250px, probably shouldn't be any larger -->
| dates = <!-- Dates of tournament -->
| venue = <!-- Venue of tournament -->
| address = <!-- Address of venue -->
| city = <!-- City and country (use {{flag}}) -->
| attendance = <!-- A number -->
| entryfees = <!-- For multiple lines, use <br> -->
| pot = <!-- What you think? (hint: prize pot) -->
| ssb64winner = <!-- Put both the singles and doubles winner in these and identify them -->
| ssbmwinner = <!-- Maybe they'll be split in future, but seems unnecessary -->
| ssbbwinner =
| pmwinner =
| p+winner =
| ssb43winner =
| ssb4uwinner =
| ssbuwinner =
| ssb64version = <!-- The version of SSB64 used (JPN, NTSC, PAL, AUS) -->
| ssbmversion = <!-- The version of Melee used (1.00, 1.01, 1.02, PAL) -->
<!-- Brawl is unversioned -->
| pmversion = <!-- The version of PM used (e.g. 3.6) -->
| p+version = <!-- The version of P+ used (e.g. 2.2) -->
| ssb43version = <!-- The version of SSB4-3 used (e.g. 1.0.2) -->
| ssb4uversion = <!-- The version of SSB4-U used (e.g. 1.1.6) -->
| ssbuversion = <!-- The version of SSBU used -->
| organizer = <!-- The organizer(s)-->
| staffgroup1 = <!-- The name of a group of staff to be listed -->
| staffgroup2 =
| staffgroup3 =
| staff1 = <!-- The list of staff in a previously-named group -->
| staff2 =
| staff3 =
}}