Wouldn't Terapagos still need to attack Bundle 3 times first in order to Tera though? I don't think it'd help in dealing with the initial turn 0 terrain/weather if Bundle does go for it.
It would, but Terapagos is very bulky even in base form (+ has access to Multiscale 3.0), can easily Calm Mind turn 1, toss a few hits then tera, or just have supportive moveset.
I also do expect the weather / terrain to be reapplied later during the battle and not just be a turn 0 thing, as if they're just a turn 0 thing the best option is to just have 2 people throw defensive cheer t1 and set up from there regardless.
Also thinking of it, with 0 EVs and 31 IVs, Iron Bundle will always have Speed as terrain boost, so removing it doesn't really matter.
I'm wondering if Frosmoth would be a decent support for this raid. Ice Scales and the Ice typing would mean that only Hydro Pump would do meaningful damage to a specially defensive one, and that's only if Bundle is Modest:
0+ SpA Quark Drive Iron Bundle Hydro Pump vs. 252 HP / 252+ SpD Ice Scales Frosmoth: 78-93 (22.6 - 27%) -- 40.4% chance to 4HKO
On this subject, considering that the main offensive move is Hydro Pump and there is the chance it also runs Blizzard, I think accuracy reducing moves may be particularly valiable on support pokemon.
And with that I really just mean Mud-Slap as usual.
As we seen back with Greninja, when the entire kit is inaccurate, accuracy reduction can easily drop the accuracy to 50% or less and be the best mitigation on the market.
Realistically, I think support pokemon should be looking at possibly bringing both Sun (to prevent freezes, reduce Hydro Pump dmg and reduce Bundle's phisical defense) and Mud-Slap, with the obvious Snarl / Struggle Bug / whatever.
I don't think there's any point in trying to hit speed cause Bundle is just too fast, expecially if it gets the Quark Drive boost.
Also while we're thinking of potential pokemon, a shoutout to Archaludon.
Archaludon @ Leftovers / Shell Bell
Ability: Stamina
Tera Type: Steel / Stellar
EVs: 252 HP / 252 SpD
Calm Nature
- Body Press
- Heavy Slam / Iron Head
- Light Screen
- Snarl
This thing gets Snarl? I didn't even know.
Calcs: (I used Dialga with Archaludon stats)
0 SpA Iron Bundle Hydro Pump vs. 252 HP / 252+ SpD Dialga: 67-79 (17.4 - 20.5%) -- possible 7HKO after Leftovers recovery
0 SpA Tera Ice Iron Bundle Freeze-Dry vs. 252 HP / 252+ SpD Dialga: 114-136 (29.6 - 35.4%) -- guaranteed 4HKO after Leftovers recovery
0 SpA Tera Ice Iron Bundle Blizzard vs. 252 HP / 252+ SpD Dialga: 180-212 (46.8 - 55.2%) -- 11.7% chance to 2HKO after Leftovers recovery
Damage aside Blizzard is very easy to tank and it only gets better once you start adding Light Screen / Snarl
You will meanwhile stack up a metric crapton of +def very quickly, meaning you'll be bonking with Body Press
+6 0 Def Dialga Body Press vs. 0 HP / 0 Def Iron Bundle: 514-606 (203.1 - 239.5%) -- guaranteed OHKO
and can use Heavy Slam or Iron Head (not sure which'd hurt more honestly) to stack tera, or just Snarl to reduce damage taken.
I think Stellar tera is the best option to keep the defensive type while also gaining "stab" on Body Press, but going full Steel would make the boss opt for Hydro Pump which can't freeze and is more inaccurate.