First of all can i ask you what do you want to achieve with the EV spread of M-Kang?
I would replace Trevenant for Gengar, that is a faster W-o-W user and a great offensive support.
Gengar @ Focus Sash
Ability: Levitate
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Bomb
- Icy Wind
- Will-O-Wisp
I like Pachirisu in teams that need to set-up, but you have nothing except a "weak" P-Up Punch. Helping Hand is a great move even if Super Fang is great too, you should try both of them and decide what's the best for your team. I'm currently using a Clefable, which is similar in support moves, bulk but offers an offensive presence too against Dragons, which you can't fast counter.
Clefable @ Sitrus Berry
Ability: Unaware
Level: 50
EVs: 252 HP / 156 Def / 28 SpA / 68 SpD / 4 Spe
Bold Nature
- Moonblast
- Follow Me
- Protect
- Helping Hand
Timid Thundurus works better if you run Hidden Power Ice, which you don't have. You need Taunt more than Swagger too.
Neutral Excadrill 252 speed allows it to outspeed any neutral Rotom (even if Rotom never goes for 252speed investment), and Mold Breaker is fantastic for hitting Levitate users (such as Rotom, Cresselia and Gengar). I like it, but i would replace Swagger for Iron Head, to deal with Fairies too.
I would replace Trevenant for Gengar, that is a faster W-o-W user and a great offensive support.
Gengar @ Focus Sash
Ability: Levitate
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Bomb
- Icy Wind
- Will-O-Wisp
I like Pachirisu in teams that need to set-up, but you have nothing except a "weak" P-Up Punch. Helping Hand is a great move even if Super Fang is great too, you should try both of them and decide what's the best for your team. I'm currently using a Clefable, which is similar in support moves, bulk but offers an offensive presence too against Dragons, which you can't fast counter.
Clefable @ Sitrus Berry
Ability: Unaware
Level: 50
EVs: 252 HP / 156 Def / 28 SpA / 68 SpD / 4 Spe
Bold Nature
- Moonblast
- Follow Me
- Protect
- Helping Hand
Timid Thundurus works better if you run Hidden Power Ice, which you don't have. You need Taunt more than Swagger too.
Neutral Excadrill 252 speed allows it to outspeed any neutral Rotom (even if Rotom never goes for 252speed investment), and Mold Breaker is fantastic for hitting Levitate users (such as Rotom, Cresselia and Gengar). I like it, but i would replace Swagger for Iron Head, to deal with Fairies too.