I guess with an unban of bundle my question is why? What value would bundle be adding to the tier outside of another Unga Bunga damage mon? Realistically it would honestly cause more damage in my opinion than positives it would bring.
Just going through two of the months listed as checks.
This is not a consistent part of Water, sitting at 16th in usage this month (13.39356%) and primarily sees play on bulky offense to stall water teams and not the more common standard balance to rain (which rain saw a major boon this month with Pelipper sitting at 53.70812%, 2nd overall). Empoleon though would be mandatory to prevent Water mirrors from coming down to bundle Freeze Dry wars as it would be the only consistent defensive check to bundle outside of Choice Scarf threats whom a majority of are walled by Toxapex with the exception of Scarf Greninja who has issues breaking through the special walls, espessically if Empoleon usage rises as Scarf Gren does pitful damage to it.
While more common than Empoleon on flying teams (34.44616% which puts it abit over usage on 1/3 of every flying team) would be the only reliable check to Bundle (Specially Defensive Corviknight is not a reliable switch in for the following reason: 252 SpA Choice Specs Iron Bundle Ice Beam vs. 252 HP / 252+ SpD Corviknight: 171-202 (42.7 - 50.5%) -- 44.9% chance to 2HKO after Stealth Rock and Leftovers recovery, the standard 252 HP/144+SpD set is a clean 2HKO after rocks) which would force flying teams to homogenize lest they get ran over by bundle. And even then Articuno still has to be scared of Bundle as Specs Hydro Pump can 2HKO and if paired with Rain would reliably 2HKO. And similarly, it would likely struggle to dent water if there was to be an increase of Empoleon (outside of a lucky freeze)
Hell, some of these guys aren't even good checks. Hoopa-U for example only checks Specs Bundle if it is AV or Scarf (beam is a clean 2HKO and Freeze-Dry is a clean 2HKO after rocks) and if bundle Flip turns on the hoopa-U switch in, now there is an Ogerpon-W or Scarf Urshifu-R in your face. I would like the new plan on how Dark is running through these guys (or SD Samu-H if it is Psychic)
Hisuian Goodra takes a lot of damage from Specs Ice Beam, and more importantly, doesn't instantly check Bundle like it would with Flutter Mane with Heavy Slam being a roll to 2HKO.
Alolan Muk could come in a Rain boosted hydro pump and take too much damage just from it to reliably check Bundle clicking Freeze Dry later in the game which runs through a lot of Poison's defensive core.
Both Iron Hands and Gallade are already on a type that from my experience, isn't great into more offensive Water teams, this would really on just make things worse them for handling a possible Greninja waiting in the back.
Also as both Royal mentioned, Water has a defensive backbone that is solid. Going through the scarfers listed (and nothing else).
and
are all walled very hard by Toxapex (well Meow isn't, but still is checked) along with
having to click moonblast/superpower to reliably slam Bundle which Pex, does Pex things against. Unburden Sneasler was also listed and that dies to Specs Hydro Pump and is also a roll for Ice beam and even after the balloon gets popped and it managed to live. Its dead to any form of Water priority or just Pex clicking Pjab (even with best case for Sneasler, Pex's PJab is an 81.3% to OHKO a Sneasler left on 46 HP). Urshifu-R also has issues with Primarina.
and
are walled by Pelipper (More than half of water teams this month) and Rotom-W (while rare, having less than 10% usage, it would possibly see a rise in usage to support Bundle with Volt switch entry) along with Scarf Landorus generally being a worse set overall for standard Ground teams (only having 19.740% usage) and Scarf Tusk not being super common (21.283% on Ground), along with Tusk itself only barely eeking past 30% usage at 30.00655% on Ground.
and
are not particularly fond of seeing Swampert outside of EBall Valiant (which never appears) of course Scarf Valiant may be physical, but thats not a worry for Pex/Pelipper usually. Now Scarf Arch does also hit a Draco which is hard but the problem with both Valiant and Arch is that they're not consistently scarf. Scarf Valiant is very rare on Fairy (13.054%) with mixed sets/SD sets proving to be more common and while it sees high usage on Fighting (41.234%) it still isn't particularly common there. Archaludon is also just more common as a bulky leftovers set than Scarf on steel (lefties at 43.650% and Scarf at 40.699%, nice) Also for Heatran, not a scarfer (18.803%)
and
would have issues with Empoleon along with defensive Primarina (either AV or just CM) being somewhat reasonable to checks them.
Of course there are far more scarfers, but these were just the ones listed and they all find different issues with Water's common defensive threats.
In response what are we gain an offensive bully for? Gliscor? Ground? The Water mirror?
If you are in desperate need for a mon capable of doing these things, I would like to introduce to you this rare and underappreciated mon that no one, but myself, has ever used before.
Of course it would do more than that Oger-W, it would check Archaludon and opposing Ogerpon formes (Wellspring is dead to freeze-Dry, and the other two are dead to Specs Ice Beam, yes even hearthflame which is OHKOed after rocks and pump just sends it to hell) but this to me isn't a healthy solution. We should be trying to reduce the fire (please guys, just accept that Arch and Glisc are lame AF), not set another building on fire to make the current burning building look like less of a disaster.
, 
, 
, 
, 
, Iron Bundle can freely do damage and swap out or even abuse Encore. This is not a healthy mon even with the more calmer metagame that we have adapted to.
