I actually think Breloom and Amoonguss are still pretty powerful Pokemon despite all the Gholdengo running around. Breloom in particular still 2HKOs most Gholdengo with Bulldoze. There is a bulkier set a top team was using to try and get around that, I'll try to find the EV spread later, but it required pretty hefty investment and a Bold nature to get around. Garganacl tends to be a harder stop for most Breloom once it Terastallizes, but switching in it can still take a pretty hefty amount of damage.
Amoonguss doesn't have as easy ways around all this stuff (though it can certainly wear down stuff like Choice / AV Gholdengo with Hex and Stomping Tantrum), but Regen more than makes up for it in my eyes. Plus its a great Breloom check in itself!
All that being said, I am pretty thankful for Gholdengo and Garganacl making Spore chill out just a bit, those two are splashable enough that I don't think we're running into the issue for that no legends ladder back in gen 7, where we were forced to use stuff like Safety Goggles Scizor to deal with Breloom, Amoonguss, and Vivillon lol.
Anyways, I went on a little adventure yesterday: I had a dream about Mario riding a Cyclizar in Mario Kart 8, and decided "ok time to finally test out Cyclizar!". My brother is letting me use his game to test out wackier stuff without tanking my rating (thanks
Deadite , yes that's my brother lol), so I went ahead and made a silly team to test Cyclizar.
I would suggest NOT using this team unless you don't care about your rating, it was made fast and has a lot of flaws.
So besides the obvious problem of "this team has a ton of mons that want to Terastallize" in Mimikyu / Cloyster / Garganacl (Rotom-W can actually get away with un tera Tera Blast), this team made a big mistake:
I made it way too dependent on Cyclizar. See, I think Cyclizar could actually be viable: passing Shed Tail to stuff like Gholdengo can be devestating, especially against passive leads like Hippowdon, and I got quite a few disgusting Cloyster sweeps by getting it in for free!
However, Cyclizar has a big issue it doesn't have to deal with as much in OU:
Cyclizar feels like a total dead weight if its the last Pokemon remaining. I used an EV spread to outspeed Scarf Garchomp (so 252 HP / 148 SpA / 108 Spe Timid), and even with SpA investment, Cyclizar was a pretty weak Pokemon, basically only able to KO some dragons with Draco Meteor. And don't even get me started on how Cyclizar was serious set-up bait after using Draco Meteor!
It took over 40 matches for me to get to Master Ball with this team, almost double of what I had to do a little under 2 weeks ago to blitz to Master Ball in Violet. If you want to make a more functional Cyclizar team on me,
make sure you have back up squads of Pokemon that can function when Cyclizar isn't chosen. Going all in on Cyclizar isn't the best idea! I'm tempted to try a physically oriented one later too, even if Outrage sucks, just to get around some of the set-up issues, though it'd be even more vulnerable to Steel-types..
Since my brother is being kind enough to let me ladder with his game, I'll be testing and reporting on all sorts of wacky ideas in the future, so stay tuned!