Hey omastar68, I have some advice which may sound mean but it's not intended to be mean. I just wannna help so basically I think you should stop changing your teams so much. The more you change your teams and use different strategies, it will be harder for you to do well. You should stick with one team and use reliable pokemon especially low ladder(1500s). For example, diggersby and manectric are great pokemon but they aren't really reliable and should only be used when you have a great idea of how they work. Initially, I recommend you have atleast two of the following - mega gengar, mega kangaskhan, garchomp and thundurus (basically S level pokemon). Also, this is my personal opinion, only breed for a team when you reach above 1400s on PS! ladder because if you cross that you can probably cross the 1600s on cart. As for the current team, you can use it but I doubt you will do well on cart. Again, I am not trying to insult you and if I did I'm sorry but this is just my opinion(I could be wrong).
That's not mean, and it's good to have a number in mind for what you want on PS before breeding for the team. S ranks are really boring to me, especially Garchomp. I've actually had great success w/ Mega Venusaur, so for now she's(why do some more male than female species seem feminine?) definitely a keeper. I was loving Mega Kanga before I found out about the Secret Power thing, but of the two S Megas it probably has better synergy w/ Venu, so I'll probably use it. Thundurus could definitely work, since I like to use T-Wave a lot and it gets priority on it, but I don't like it's fairly poor bulk(I'd probably compensate for is by going Bold-it's paralyzingly anyways, don't need too much speed.) The main problem is bad synergy w/ Gyara and Talon. Thundy I compounds rock w/ both, and resists none of their other weaknesses(electric and water.) I'm ditching Diggersby, so at least the ice weakness doesn't matter too much. I'll try and do something more
boring standard before trying more niche stuff(MM is kinda by the book, and AV Diggersby is a perfect or near perfect counter to Mega Gengar, but they're both more niche than something like Kang or Thundy.)
EDIT:
Venusaur @ Venusaurite
Ability: Chlorophyll
Level: 50
EVs: 252 HP / 36 Atk / 220 Def
Relaxed Nature
- Earthquake
- Sludge Bomb
- Synthesis
- Leech Seed
Talonflame @ Maranga Berry
Ability: Gale Wings
Level: 50
EVs: 236 HP / 4 Atk / 44 Def / 188 SpD / 36 Spe
- Brave Bird
- Roost
- Will-O-Wisp
- Taunt
Thundurus @ Sitrus Berry
Ability: Prankster
Level: 50
EVs: 244 HP / 168 Def / 68 SpA / 28 Spe
Bold Nature
- Thunder Wave
- Volt Switch
- Hidden Power [Ice]
- Swagger
Kangaskhan @ Kangaskhanite
Ability: Scrappy
Level: 50
EVs: 142 HP / 252 Atk / 116 Spe
Adamant Nature
- Double-Edge
- Ice Punch
- Earthquake
- Counter
Mamoswine @ Assault Vest
Ability: Thick Fat
Level: 50
EVs: 196 HP / 252 Atk / 60 Spe
Adamant Nature
- Ice Shard
- Icicle Spear
- Knock Off
- Earthquake
So I've done quite a few more battles, and I think I'm almost settled on a team(actually serious this time, I've had positive experiences w/ all of these Pokemon and hilarious ones w/ most of them.) What I've discovered is Cresselia really isn't working out for me. It seems like she's a natural fit, w/ T-Wave and Lunar Dance, while also dealing w/ Megamence and Kanga, but such low offensive presence hampered her vs everything. It'd often cost a ton of momentum when I'd have to switch her out, which is especially difficult since my team doesn't have very many immunities. Mega Gengar is way more of a problem w/o Diggersby, and Cress fails epically against it. What I want for that slot is something that can spread paralysis reliably, while making use of Leftovers(not so much a must, but if the new Poke doesn't need them I may as well give them to Thundy. Swagger and paralysis often buy him free turns, which meshes nicely w/ Leftovers,) deals actual damage to opponents that don't have a 4x weakness to its sole coverage move. A set up move Pokemon could work well, and I also kind of want it to beat Mega Kangaskhan and Mega Gengar. Aegislash does pretty much everything but the paralysis, but that's not really good enough for me w/ all my slow(ish) Pokemon. I've thought about Reuniclus, as it can do lots of stuff like Calm Mind, Double Team + Flame Orb, spreads paralysis, and has reliable recovery. Even with all those pros, though, it fails miserably vs Kang and Gengar if Trick Room isn't up, and this isn't a TR team. It's switch in opportunities are also few and far between, and it's physical bulk(probably) won't let it switch in on .mega Blaziken's HJK followed by a Flare Blitz.
Other than that last slot, which is obviously the main thing, there's still some stuff I'd like help w/. First off is Volt Switch or T-Bolt for Thundy. The set I otherwise copied off the strat Dex says T-Bolt, but VS isn't that much weaker, and has tons of utility. Next is Counter on Kangaskhan. It's worked quite well for me, but is it different on cart than PS? On PS it hits twice meaning it returns 4x the damage the opponent deals to Kang, which means opponents who deal 25% or more. To Kang w/ a physical move die if they're not immune to fighting. Another thing is Sucker Punch. I really like the move, and think it's especially good to use since I tossed out Cress, but what, if any, move can it go over? Ice Punch could probably go since I have enough ice coverage already, but I also want to use Rockp Slide(absolutely absurd chance to flinch, particularly w/ paralysis,) and I don't think I should get rid of EQ(again, lots of coverage of that type already, so maybe I could drop it, but idk.)
Next is Mamoswine. The set provably seems fine, and for the most part it is, but I'd like to run Freeze-Dry, as Gyarados can be a problem, and cuts attack w/ Intimidate. There's also that extremely annoying guessing game of mega or not-FD bypasses that entirely. It's also amazing for Mega Swampy(Waterfall kills, but if for some reason it's slower or I decide on a screen user for my sixth slot, I have that to deal w/ it.) Rotom-W is another huge target for FD. It might KO, but compared to Knock Off's damage it's pretty nice. Then there are some lesser things(Suicune before any boosts, Quagsire, etc.) The problem w/ switching over to a Freeze-Dry set is I really want AV for the item(Thundurus is a problem, and AV prevents Grass Knot and Focus Blast from OHKOing. Plus there's other special attackers like Gengar it's a huge help against,) which means no -SpD nature. Is Brave a good option? It makes me even more dependent on spreading paralysis, but that's already a big part of the team, and I'm definitely not going to run a Lonely nature on Mamo or use FD w/ an Adamant nature. Lastly, the choice between Knock Off and a Rock Tomb(or something like that,) is kinda tough, so if I could get a few people to weigh in on that that'd be much appreciated. I went Knock Off for Cress and Porygon2, mainly, but Cress doesn't take nearly enough from Knock Off, and just heals the damage off, while P2 is surprisingly rare.
Sorry for the giant post, but it's better to be too detailed than not detailed enough.
