E3の方はFor Fun（エンジョイ）とFor Glory（ガチ）のコーナーがあるようだ https://e3.nintendo.com/attendee-faq/
There are two ticket types that allow you to play the Super Smash Bros. game:
"For Fun": Play casually against other people
"For Glory": Test your skills and see how you stack up against other competitive players. Winners advance to play in up to three rounds, after which an overall winner is declared.
