Pokemon Violet - 7* Feraligatr the Unrivaled with Primarina and Koraidon
6Been a while, but it's the next 7* starter!
7* tera dark Adamant Feraligatr has x35 HP and a 550-second timer, and its regular moveset is Liquidation, Crunch, Ice Punch, and Psychic Fangs. (No buff move in regular moveset!) It immediately uses Swords Dance, then at 95% time remaining steals a tera orb charge, then at 70% time remaining uses Earthquake, but before that at 75% time or 75% HP puts up shields (covering 45% of the health bar). Meanwhile, at 80% HP it resets player buffs, at 65% HP it resets its own debuffs, and at 50% it uses Dragon Dance then (as usual) starts having a 50% chance to use a second move every turn.
Don't forget that it has its hidden ability Sheer Force! Liquidation, Crunch, and Ice Punch all lose their extra effects in exchange for having x1.3 power.
Not having a buff move in regular moveset means regular strats are viable here, which is nice; even just one Intimidate ally is enough to counteract the scripted buffs.
0:00 - Primarina
I'm sure there are better options here, but I never raised a Primarina so this seemed like a good opportunity. Water/fairy resists the two most damaging moves (though maybe you should postpone terastallization to keep resistances...), and it can Calm Mind then Draining Kiss for damage plus sustain.
On top of that, if you need more debuffs, Chilling Water can reduce attack and Icy Wind can slow it down! 148 Spe EVs allows a neutral Primarina to outspeed Adamant Feraligatr before Dragon Dance, and so Icy Wind allows you to pre-emptively counter Dragon Dance after the debuff wipe, which is cute.
(Not so cute is its 5% chance to miss, though...)
7:48 - Koraidon
It's a fighting-weak raid, so of course I'll attempt a Collision Course oneshot!
The usual '2x Swords Dance, 1x Screech, attack cheer, Collision Course' strat just barely doesn't work because of Feraligatr's above-average defense; the damage spread is something like 70% to 82.4% of its (x35) HP, whereas at 80% Feraligatr wipes player buffs, so even if you wanted AI attacks to whittle it down right to the edge, you'd both need to somehow stop within that 2.4% and then actually high-roll the damage spread.
Luckily (?), Feraligatr has super-effective moves, which allows you to replace Life Orb with a Weakness Policy! With +4 Atk against -4 Def the damage spread is now 81.5% to 95.9%, much wider, and with two Screech plus the attack cheer the AI will surely get health low enough to make it possible... though you also need really good AI allies and luck in order to actually survive long enough to set up.
(This took a dozen attempts with this locked-in AI team... and this was the first one where Staraptor bothered to use Feather Dance on turn 1 instead of spamming Brave Bird. Sure is nice that everything lined up.)
Body Press strats also surely work (I was tempted to record a run with newly-obtained-from-GTS Zamazenta but decided against it), Belly Drum Azumarill works, maybe fighting-type Draining Punch (or Slither Wing Leech Life) spam works, Unaware Clefable can probably do the job... This raid doesn't seem too restrictive, plenty of leeway.