Gen 4 Alright, here is my trash team, what can I do to make it better @ experienced DPP players?

[Fazesupernappa]

Alright so I made a team where I wanted to use Hariyama cause I felt like it but idk wtf I'm doing at all so here's the team, what can I do to make it less trash OTHER than remove Hariyama?

Hariyama (Hariyama) (M) @ Toxic Orb
Ability: Guts
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Fake Out
- Close Combat
- Payback
- Ice Punch

rotom baby (Rotom-Heat) @ Leftovers
Ability: Levitate
Shiny: Yes
EVs: 100 HP / 128 SpA / 200 SpD / 80 Spe
Timid Nature
IVs: 0 Atk
- Overheat
- Thunderbolt
- Will-O-Wisp
- Thunder Wave

bug (Flygon) (F) @ Choice Scarf
Ability: Levitate
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- U-turn
- Draco Meteor
- Earth Power
- Fire Blast

Da pert baby (Swampert) @ Leftovers
Ability: Torrent
Shiny: Yes
EVs: 140 HP / 176 Atk / 192 Def
Impish Nature
- Stealth Rock
- Waterfall
- Toxic
- Earthquake

j (Jirachi) @ Leftovers
Ability: Serene Grace
EVs: 224 HP / 100 Atk / 52 Def / 100 SpD / 32 Spe
Impish Nature
- Wish
- U-turn
- Fire Punch
- Iron Head

yuck (Metagross) @ Choice Band
Ability: Clear Body
Shiny: Yes
EVs: 100 HP / 152 Atk / 80 SpD / 176 Spe
Jolly Nature
- Meteor Mash
- Earthquake
- Pursuit
- Explosion

 

[Twilight]

Hi, welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide at least 3 lines of descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require. PM me with updated descriptions and I'll be happy to unlock this.