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This team I built a few weeks ago let me reach almost 1600s, all the description is inside the paste. This was a pre-Porygon ban team, so I adapted it to the new meta in case someone wants to give it a shot.
Name: Altariel von Sweep
Tiers Played: SV, SM, ORAS
Primary Eligibility: Spain
Secondary Eligibility: Europe
Interested in Captaincy?: Hell no
Significant Time Missed: mid jan to late feb (uni exams)
won in 3 ggs
https://replay.pokemonshowdown.com/gen9lc-1978296405-2ze1n6elkpkh5bep0vtuixni0ddjotbpw
https://replay.pokemonshowdown.com/gen9lc-1978300841-piituzvhuty9pk53gw2cwrzt7trxuwxpw
https://replay.pokemonshowdown.com/gen9lc-1978304717-o9c7dxf8ga6y6t70iuvs4jadlovvrh1pw