Hey Genga. Well, I've been wanting to rate one of your NU teams for a while, and I must say this is a very nice team. Not many problems with it at all, just a few minor fixes here and there :] well let's go!
Not bad at all. However, you'll want 252 HP for better bulk before you invest in any defenses, so choose whether you want it to be a physical wall, special, or mixed. Also, Protect isn't really helpful for you, so replace it for Toxic for stalling.
Since Water-type coverage is already there in Aqua Jet, you'll want Stone Edge over Waterfall, for a nice secondary STAB as well as hitting Grass types neutrally.
Lovely; you'll want a Jolly nature though, to be able to outspeed positive natured base 100s and 105s, such as Electabuzz, Kadabra, Rapidash, and the Simis. Wild Charge isn't really hitting anything hard enough to be useful - it still does pitiful damage to Alomomola, for example. Give him Zen Headbutt instead to hit Fighting types on the switch in, and also 2HKO one of NUs premier physical walls Weezing.
Okay, so you have 3 choiced pokemon on this team, which will be hard to work with. And nobody say "3 choiced pokemon is dangerous for the opponent, not Genga" because it's not true xD Now Gardevoir should have Trace, for starters - it lets you revenge kill Swift Swim and Chlorophyll abusers, copy Flash Fire & Motor Drive for safe switchins, and Speed Boost to victory, among other things. It's just awesome. Also, I recommend taking her Choice Scarf away, and giving her an Offensive Calm Mind set.
Gardevoir (M) @ Life Orb
EVs: 252 SAtk / 252 Spd / 4 HP
Timid Nature (+Spd, -Atk)
- Calm Mind
- Shadow Ball
- Focus Blast
Calm Mind boosts Gardevoir's already amazing Special Attack. Psychic is STAB. Focus Blast hits Dark & Steel types, while Shadow Ball nails opposing Psychic types. Life Orb is preferred for the power boost, but Leftovers or Expert Belt can be used for healing or to bluff a Choice item, respectively. Gardevoir forces quite a lot of things out, such as Muk, Weezing, Golbat, Sawk, Throh, and Gurdurr, so it's quite easy to get one or two Calm Minds up. From there, you can start sweeping!
Well, now that you don't have a Choice Scarfer, you need one, and Rotom is probably the best Scarfer in the business :D
Rotom-S @ Choice Scarf
EVs: 4 Def / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Volt Switch
- Air Slash
- Hidden Power [Grass] / Trick
Thunderbolt and Air Slash for STAB. Volt Switch lets you scout and gain momentum. I like to run Trick, as it ruins many Eviolite users and walls in NU, but Hidden Power [Grass] works well too.
Well that's the end of my rate! Hope I helped :]