Trying to reach Master Ball Tier in the Pokémon Scarlet and Pokémon Violet Ranked Battles Season 19

This is me, trying to climb the ranks with this Proto type Shadow Caly team I just built.
Not that great to be honest. And I'm extremely pretty rusty with the current VGC season.
Need to tinker with the EVs before I try replacing Mons.
The EVs in this team is still unchanged from last season. To be honest, I forgot already. Need to inspect their EVs one by one but the Shadow Caly's EV, I'm sure is still a standard 252 SpA 252 Spe 4 HP from Sword and Shield.
Feel free to suggest better options/strategies.
Hope you enjoy this video.
Please like and subscribe.
Thank you so much and Have a Happy PokeLife fellow trainers!