can you feel my heart?
Hi Bokusachi! I'm glad you spent so long researching, and for something simple like competitive battling with some friends it's not so hard to be successful. But I'm going to try to take this in the frame of mind that you want to be successful all of the time, and some of the movesets and Pokemon you've chosen don't exactly "spark" success because they're generally poor when performing in the metagame. I dunno if you know what I mean by "metagame", either - the metagame is like the summary of the competitive battling scene at this point in time. It's always changing, thanks to people inventing new sets that counter/set up on certain Pokemon, and then other people inventing new sets that counter/set up on those Pokemon, and so on and so forth. It's constantly evolving, and some of those Pokemon you chose... just aren't up to speed with it. But anyway, I'll try my best to help you out and at least attempt to keep most of your Pokemon similar. :c
Also as far as competitive battling terms - I'm not going out of my way to not use them because you won't learn anything that way. I'd rather explain them, ok?
Tiers are actually really easy as of right now, because we only have two of them - OU and things banned from OU, which are in Ubers. Everything that's not in Ubers is perfectly legal to use - "legendaries" aren't really the best terms to describe them as, because Mew, Heatran, and Latias are legal to use because they aren't considered broken but Rayquaza, Giratina, Zekrom, and Reshiram are considered too strong and aren't allowed to be used. You can find the ban list here; it's generally the same banlist anywhere because we follow Smogon's tiers. That's what we follow, anyway. With your friends you can make up whatever banlists you want, I guess, and I'll try to respect that you don't want legendaries for now. Just know that not all of them are unusable or too powerful.
This is the only really good lead set imo. One of the biggest reasons to use Mamoswine as a lead is its ability to set up SR while also doing heavy damage and finishing things off with Ice Shard. Basically, if you're faster, set up SR and take a hit with your Focus Sash, and then Endeavor their health down to 1 making that Pokemon essentially useless. If you're slower, Endeavor first turn to bring them down to 1hp, and then Ice Shard to kill off their lead. Earthquake is for other STAB and Stone Edge I suppose is a viable replacement for Stealth Rock if you cannot get it.
I dunno how to figure out your Metagross vs Bronzong mess with formatting but tbh all I wanted to say was that Bronzong is probably better in this metagame, as it gives you QuakeEdge resistance (resists Ground/Rock; not many Pokemon do and a lot of Pokemon use that for coverage) and helps you stop stuff like Landorus and Excadrill. You probably also want Trick Room & Hypnosis, with an EV set like 252 Atk / 252 HP / 4 Def @ Brave (+Atk, -Spe) and as little speed as you can get on it.
This is what I was talking about earlier with some of your team not exactly looking up to pace. None of these Pokemon are very viable at all. Cradily and Armaldo especially are NU (Neverused - that's another tier, but it hasn't yet been set. Obviously it's where the never used and not very good at all Pokemon go) material. Crustle is slightly better, but it wants the move Shell Smash. TBH if you really wanted to abuse Sandstorm you should run Tyranitar - it auto-sets Sandstorm with its ability, meaning you don't have to waste a moveslot with it. Copied & pasted from our threat list since I haven't used Tyranitar in a while and don't remember the exact specifications of it:
Tyranitar @ Leftovers
Brave Nature (+Atk, -Spd)
Evs: 252 HP / 88 SpA / 168 SpD
- Stealth Rock
- Fire Blast
- SuperPower / Stone Edge
Fire Blast helps you roast stuff like Skarmory that want to come in and pretend to wall Tyranitar.
TBH I also wouldn't run either Gallade or Infernape. Infernape is decent, but neither are particularly good. If you want something that's really effective (and you're using Tyranitar - don't use this if you aren't!) you should try Sand Rush Excadrill. Its speed doubles in Sandstorm, which Tyranitar auto-starts and makes it an awesome revenge-killer/clean-up sweeper. Again, C/P'd from the threat list...
Excadrill @ Air Balloon / Life Orb
Trait: Sand Rush
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature (+Spe, -SAtk)
- Swords Dance
- Rock Slide
- Return / X-Scissor
Air Balloon lets you beat other Excadrills, but since this is vs friends I'd imagine you're not going to be facing many, so Life Orb is perfectly viable. X-Scissor lets you hit stuff like Bronzong and bulky Grass-types hard, where Return lets you hit things like Rotom-W harder. It's preference, though you gotta remember you need max happiness for Return to be effective.
Let's be frank, Kingdra isn't very effective setting up his own rain - plus, he has Dragon Dance which boosts his attack & speed regardless. Also, running Rain Dance + Tyranitar/Excadrill is a no-no. Kingdra will let you take advantage of your opponent's rain if they have any, anyway. Substitute protects you from annoying status moves like Will-o-Wisp and Toxic, and makes it easier for you to predict. Waterfall/Outrage provide very good two-move coverage and they're both STABbed and physical moves, meaning they're boosted by Dragon Dance which is nice.
Togekiss... looks okay, I think. I haven't used one in a while but just make sure you're running 252 SpA / 252 Spe @ Modest or Timid (dunno which is better).
Good luck with your team!