Well I can now officially say I've beat this game. Hope you're still accepting and adding people to the hall of fame. Well anyway, my team was as follows:
Banette @ Bannetteite
Relaxed
Ability: Frisk
Poltergeist
Trick Room
Shadow Sneak
Thunder Wave
The longest running team member, picked it up from Viridian 10 minutes into the hack and it's been on and off the team for ages but has always been in clutch for me when I needed it the most, including setting up Trick Room on the final battle.
Eelektross @ Expert Belt
Quiet
Ability: Fatal Precision
Zap Canon
Fire Blast
Hydro Pump
Volt Switch
This was a Seviper for most of the run, but I was keen to switch to Eelektross as it's a mostly useless otherwise Pokemon that gets an incredible buff in this game. Being able to land Zap Canon without ever missing makes it so good.
Wailord @ Chesto Berry
Calm
Ability: Multiscale
Bouncy Bubble
Ice Beam
Rest
Rain Dance
This bulky mon has been saving me throughout the run on multiple occasions, especially in multi battles, with how bulky it is and the ability to so reliably deny weather. Incredible move and ability combo thats brand new to this game. Almost used Dewgong instead though.
Torterra @ Yache Berry
Jolly
Ability: Self-Sufficient
Wood Hammer
Earthquake
Head Smash
Shell Smash
The only mon I had to breed up in the min grinding playthrough. It took so long from getting the female Turtwig to where I could actually catch a Turtonator its unreal. The roadblock stopping you from going to bike road until you beat Sabrina was probably the most frustrating thing in this entire game. Originally knew Grav Apple too, passed down from the Flapple I had been using up til that point, but it just wasn't doing enough damage, even after a Shell Smash.
Granbull @ Choice Scarf
Naive
Ability: Bull Rush
Play Rough
Close Combat
Crunch
Rock Slide
The second longest surviving member on my team. As soon as I saw it had a unique typing and a brand new ability I knew I had to use this thing. Really started dropping off in the late game until I found the Choice Scarf where it went right back to being clutch, even securing the final blow of the run.
Darmanitan-G @ Leftovers
Jolly
Ability: Zen Mode
Icicle Crash
Flare Blitz
Earthquake
U-Turn
Earthquake was Superpower and Lefties was Choice Band up until the very final fight, but this is probably the most standard pick of the entire team. Was originally an Alolan Marowak for its fun new ability until Alolawak wasn't proving its worth anymore and a perma Zen mode Darmanitan sounded too good to pass up. Lost the 1v1 against the rivals Darmanitan-G unfortunately, but still was a powerhouse throughout the end game.