Gavin Dempsey (born April 11, 1998),[1] also known as Tweek, is an American professional Super Smash Bros. player.

He represented multi-esport organization Phoenix1 in several Smash for Wii U events, including his MkLeo Saga victory.

[5] In 2016 he had a number of strong showings at major tournaments, including taking third place at Glitch 2 and ninth at Genesis 4, and in February 2017 he was signed by esports organization Phoenix1.

The organization, which had previously only fielded competitors in League of Legends, called him "one of the best up and coming talents in Smash".

He started the year with a second-place finish in Frostbite 2018,[13] followed by wins at King of the Springs 3 and Enthusiast Gaming Live Expo 2018.

[15] As a free agent, he won MomoCon 2018 in May and 2GG: Hyrule Saga in June, both also considered major tournaments, then placed second at CEO 2018 in July.

By this time, Panda Global listed his main character as Bayonetta, with Cloud Strife and Donkey Kong as secondaries.

Ultimate, Panda Global released a list of the 100 best players of all time for Super Smash Bros. for Wii U, which ranked Tweek 7th.

In their analysis, Panda Global noted that while Tweek was one of only a small number of people to win major tournaments in Ultimate, there were portions of the year where he seemed to struggle around which character to play.

In July he won Low Tier City 7, a PGRU major, debuting Pokémon Trainer as his combatant.

[citation needed] At the end of the year, Tweek fell one spot in the Panda Global Rankings to third, behind MkLeo and Ezra "Samsora" Morris.

[39] Frostbite was Tweek's last event before Panda Global Rankings suspended the 2020 competitive season due to the COVID-19 pandemic.

He fell at 9th place at Low Tide City 2021, where he was knocked out of Losers' Bracket by Alexis "Goblin" Stennett, one of the few players to have a perfect winning record against Tweek.

[46] He placed 17th at the Smash World Tour Championships in December, the last major tournament of the year, where he was defeated by Dominican player Carlos "Sonix" Pérez.

He was defeated by Japanese player Naoto "ProtoBanham" Tsuji, who subsequently knocked MkLeo out of the tournament as well.