Super Smash Bros. Ultimate was released in December 2018.
Maister did not travel to many tournaments in the first six months after the game's release.
He placed third at a minor tournament in March 2019, Full Bloom 5, before securing his first win in Ultimate at Combo Breaker 2019, for a second consecutive Combo Breaker title.
These results were not enough for Maister to secure a spot in the inaugural Panda Global Rankings Ultimate (PGRU), which covered the first half of 2019.
In July, Maister announced that he had left Sinai Village, and later that month announced that he had been sponsored by the esports team of Anáhuac University.
Under the arrangement, the university would gave Maister a scholarship as well as money for travel to Smash events.

Maister attended a much larger number of events in the second half of 2019, finishing within the top 24 in every tournament he attended, and securing several high placements.
In July he took third place at Smash Factor 8, which was held in Mexico.
He tied for 17th at Evo 2019, then tied for 5th at Super Smash Con 2019, both in August.
In September he tied for 17th at another major tournament, Mainstage 2019.
In September, esports organization Nevermore announced that they had signed Maister.
He and the organization would part ways less than three months later.

His strongest month came in October, which he started by winning Little Big House 5, then placing third at The Big House 9.
He defeated the eventual winner of the tournament, Sota "Zackray" Okada, in winner's semi-finals before being eliminated by Zackray in a rematch in loser's finals.
In the latter half of the month Maister won 2GG: Nightmare on Smashville, which secured him the final open spot at the Smash Ultimate Summit 2 invitational tournament.
He would go on to finish fourth at Summit 2.
He would finish off the year with a third-place finish at 2GG: Kongo Saga.
Based on his string of high placings at major tournaments, Maister went from being unranked in the previous season to being ranked the 6th best Smash Ultimate player in the world in the Fall 2019 Panda Global Rankings Ultimate.

Maister continued his string of top-24 showings in early 2020.
He tied for 7th at Let's Make Big Moves 2020, tied for 17th at Glitch 8, and tied for 5th at Genesis 7.
In February, Maister signed with multi-esport organization Spacestation Gaming.
Prior to being signed, Maister was the highest ranked player without an organization.
Shortly after being signed, he took 2nd at Frostbite 2020, losing in the grand finals to fellow Mexican player Leonardo "MKLeo" López Pérez.

Due to the COVID-19 pandemic, most of the tournaments scheduled for the first half of 2020 were canceled or moved online.
Ultimate's online service suffers from noticeable input delay and lag, and many top players – including Maister – had poorer than normal performances in online tournaments.
At the end of April, Maister tied for 9th at Pound Online.
Weeks later he tied for 13th out of 8,192 participants at the Hungrybox-organized The Box tournament.
Super Smash Bros. Ultimate was released in December 2018. Maister did not travel to many tournaments in the first six months after the game's release. He placed third at a minor tournament in March 2019, Full Bloom 5, before securing his first win in Ultimate at Combo Breaker 2019, for a second consecutive Combo Breaker title. These results were not enough for Maister to secure a spot in the inaugural Panda Global Rankings Ultimate (PGRU), which covered the first half of 2019. In July, Maister announced that he had left Sinai Village, and later that month announced that he had been sponsored by the esports team of Anáhuac University. Under the arrangement, the university would gave Maister a scholarship as well as money for travel to Smash events.
Maister attended a much larger number of events in the second half of 2019, finishing within the top 24 in every tournament he attended, and securing several high placements. In July he took third place at Smash Factor 8, which was held in Mexico. He tied for 17th at Evo 2019, then tied for 5th at Super Smash Con 2019, both in August. In September he tied for 17th at another major tournament, Mainstage 2019. In September, esports organization Nevermore announced that they had signed Maister. He and the organization would part ways less than three months later.
His strongest month came in October, which he started by winning Little Big House 5, then placing third at The Big House 9. He defeated the eventual winner of the tournament, Sota "Zackray" Okada, in winner's semi-finals before being eliminated by Zackray in a rematch in loser's finals. In the latter half of the month Maister won 2GG: Nightmare on Smashville, which secured him the final open spot at the Smash Ultimate Summit 2 invitational tournament. He would go on to finish fourth at Summit 2. He would finish off the year with a third-place finish at 2GG: Kongo Saga. Based on his string of high placings at major tournaments, Maister went from being unranked in the previous season to being ranked the 6th best Smash Ultimate player in the world in the Fall 2019 Panda Global Rankings Ultimate.
Maister continued his string of top-24 showings in early 2020. He tied for 7th at Let's Make Big Moves 2020, tied for 17th at Glitch 8, and tied for 5th at Genesis 7. In February, Maister signed with multi-esport organization Spacestation Gaming. Prior to being signed, Maister was the highest ranked player without an organization. Shortly after being signed, he took 2nd at Frostbite 2020, losing in the grand finals to fellow Mexican player Leonardo "MKLeo" López Pérez.
Due to the COVID-19 pandemic, most of the tournaments scheduled for the first half of 2020 were canceled or moved online. Ultimate's online service suffers from noticeable input delay and lag, and many top players – including Maister – had poorer than normal performances in online tournaments. At the end of April, Maister tied for 9th at Pound Online. Weeks later he tied for 13th out of 8,192 participants at the Hungrybox-organized The Box tournament.
Maister (gamer)