So since we're obviously given Amoonguss with the clear intent for us to avoid Venusaur, I took the other route and went for a SunRoom team. Charizard is generally a really solid Pokemon for Trick Room, since it deals very well with Public Enemy #1 Amoonguss. Since I didn't want to go completely Full TR, I chose to make a more speedy build for Charizard to have an offensive option out of Trick Room (and since most mushrooms will be getting roasted outside of TR anyway). The EV spread is pretty much just the standard Charizard with 8 EVs shifted for SAtk to Spe to outrun things trying to speed creep Breloom. How naughty of me >:3
Amoonguss is pretty standard LOL, I don't think there's much to say here. I think mushrooms are pretty nice and can be very tasty if prepared correctly, but Amoonguss isn't really. Not that I would know, since I've never tasted one. But I don't think it would be. Please correct me if you have substantial evidence that I'm wrong (about the latter point; I really don't want to hear about how you dislike mushrooms). This spread originally had a Relaxed nature, but I realised that surviving Megagross' Zen Headbutt wasn't quite so important since I'm running a SUN TRICK ROOM team with AEGISLASH and MAROWAK what was I thinking gosh. Amoonguss still plays a pretty vital role to the team though, redirecting nasty attacks from Charizard and Marowak and Conkeldurr and literally everyone else and also putting stuff to sleep, yee haw.
Right after I decided on SunRoom I also decided on Marowak. Marowak is str8 up c a $ h a pretty good fit for a SunRoom team. Marowak gets some degree of protection from Water-type moves thanks to Charizard's Drought, so it doesn't disappear as soon as a Scald or Hydro Pump comes its way. Perhaps more importantly, though, it grants an Electric pseudo-immunity to Charizard, which gets Thundurus and random dumb Thunder Waves off its back (but watch out for Kyurem-B's Fusion Bolt!) while just whacking things super hard with its similarly hard Bonemerang. Rock Slide is there to nail Flying-types as well get off some #flinchstones under Trick Room, while Low Kick gives Marowak a more reliable (90% = 30%) option to pick off Kangaskhan and Heatran after some chip damage, as well as OHKOing most Hydreigon builds. I guess Rhyperior would have been a more conventional choice for this slot, but I chose Marowak because (a) I'm sick and tired of Drill Running into Aegislash King's Shields and having my Attack cut, (b) Bonemerang does so much damage it's not funny, and (c) I didn't want to get taken out by every single random Water- and Grass-moves cough Grass Knot Thundurus cough.
So while I like the option of nuking everything with Marowak, I decided that I needed another, bulkier Trick Room Attacker. Conkeldurr fills this slot, since I think STAB Fighting is just really good, plus Knock Off and Iron Fist Ice Punch asdhjaskhajfjdf *foams at mouth*. The EVs survives a Psyshock from a Life Orb Latios, and makes Timid Mega Charizard Y's Heat Wave a 3HKO in the sun. As I write this I realise I just regurgitated the benchmarks that the standard set hits, since this is, of course, the standard set. But yeah, Conkeldurr was real good at nailing Landorus-T so that was pretty much enough to put it into my good books.
So uhhh I am four Pokemon into my SunRoom team without a single Trick Room setter. I decided to just be completely standard here and go for the less cute duck, Cresselia. I was originally thinking of using Porygon2, but while that is a cuter duck, I really like Helping Hand, especially next to Charizard / Marowak / Conkeldurr. Anyway, Cresselia exists on this team pretty much just to set up Trick Room and use Helping Hand or something, so what else is new, huh? The physical bulk EVs give Adamant Kangaskhan's Double-Edge just a 1.9% chance to 2HKO Cresselia with the Sitrus Berry (and assuming that Cresselia somehow manages to avoid getting crit. Read: People with Stratos-level luck, don't use this spread). Similarly, the special bulk EVs give Modest LO Hydreigon's Dark Pulse a 4.9% chance to 2HKO Cresselia under similar circumstances and stipulations. Adding the extra 12 EVs to Def only reduce the odds to 1.1%, while they don't help on the special side much either, so I dumped them into SpA to get a little more damage off.
Now I just needed something to put big damage into opposing Cresselia, as well as not die 100% of the time to Diancie. Aegislash is boring but if you put butter on it I bet you can spread it on Amoonguss to make Amoonguss taste better, mmm. Also, it brought Wide Guard which was really nice for everyone else, since Amoonguss didn't enjoy Heat Waves and Charizard literally every Pokemon on the team dislikes flinching under avalanches of ROCK SLIDES (or Diamond Storm but we know which one's more important, duh). So yeah, that's it, the team is pretty cool, give it a spin if you like.
