I have Pokemon Platinum, so some of the moveset might not be to the utter most advantage. I came up with this team on my own. It is a mixed tier team. The EVs: where chosen because of its role in the team and its moveset. I do not have PokeSav, so I have to do all the work (moveset, ability, and item) by myself. I am new to pokemon competitive battling. So far I have only been able to fight against my friend over wireless. I really don't about what natures to give the pokemon.
*means STAB
Forretress @ Berry that makes super effective fire type moves weak
Ability: Sturdy
EVs: 252 Def/ 132 HP/ 126 Atk
Nature:
- Toxic Spikes
- Rapid Spin
- Gyro Ball*
- Explosion
Toxic Spikes it to do some additional damage, to nearly all the Pokemon. Rapid Spin is to take out any entry hazards that have been sent out by the opponent. Gyro Ball is to do damage. Since most people like to play with faster teams and most pokemon do not have a very bad speed Gyro Ball can do some mediocre damage. STAB helps with the Gyro Ball as well. Explosion is to be used to either take out a wall or to suicide since you only have a little health on Forretress and to do great damage at the same time.
Metagross @ Item that increase accuracy (Wide Lense)
Ability: Clear Body
EVs: 252 Atk/ 200 Def/ 58 Speed
Nature:
- Meteor Mash
- Hammer Arm*
- Zen Headbutt*
- Agility
Meteor Mash is going to be to get the STAB and the Attack raise. Zen Headbutt is going to also be for the STAB. It also has 90% accuracy. It also may make the target flinch. Hammer Arms is going to be for the fighting type attack and the 90% accuracy. The speed drop can be recovered with Agility. Agility is to increase my speed to make me a better tank/sweeper
Gengar @ Black Sludge
Ability: Levitate
EVs: 252 Speed/ 252 Sp. Atk/ 6 HP
Nature:
- Shadow Ball*
- Destiny Bond
- Dark Pulse
- Curse
Shadow Ball is for the special defense drop. It is also for the 100% accuracy. The STAB helps with the damage rate. Destiny Bond is in case I know that I am going to die and I need to kill the opponent or else I will lose the whole battle. Dark pulse is for the accuracy and the flinch rate. Curse is to rack up damage on the opponent. With the spikes, curse, and being attacked the opponent has a smaller chance of survival.
Rhyperior @ Life Orb
Ability: Lightning Rod
EVs: 252 Atk/ 126 HP/ 132 Def
Nature:
- Stone Edge*
- Earthquake*
- Megahorn
- Thunderbolt
Stone Edge is for the STAB and the high critical hit rate. Earthquake is for the STAB with the 100% Accuracy. Megahorn is to take out the grass type threats with 120 damage. Thunderbolt is for eliminating most water threats.
Lapras @ Shell Bell
Ability: Shell Armor
EVs: 200 HP/ 240 Sp. Atk/ 70 Speed
Nature:
- Icebeam*
- Surf*
- Ancient Power
- Perish Song
Icebeam can take out any grass type pokes that are threats. It also has 100% accuracy with 95% power. Not only does that help, but the freezing rate can come in use. Surf has the same abilities as Icebeam with attack and accuracy except is for meddling rocks and does not have freeze rate. Ancient Power is to take out thunder type pokemon. It also helps in raising all the stats. 100% accuracy is pleasurable. Perish Song is to piss of the opponent and to help eliminate a poke or cause a switch out.
Togekiss @ Leftovers
Ability: Serene Grace
EVs: 252 HP/ 160 Speed/ 98 Sp. Atk
Nature:
- Wish
- Extreme Speed
- Aura Sphere
- Air Slash
Wish is to heal anything that needs healing. That can either be Togekiss or anyone else on the team. Extreme Speed is for the priority. Aura Sphere is for the perfect accuracy. Air Slash is for the 30% w/o serene grace flinch rate.
*means STAB

Forretress @ Berry that makes super effective fire type moves weak
Ability: Sturdy
EVs: 252 Def/ 132 HP/ 126 Atk
Nature:
- Toxic Spikes
- Rapid Spin
- Gyro Ball*
- Explosion
Toxic Spikes it to do some additional damage, to nearly all the Pokemon. Rapid Spin is to take out any entry hazards that have been sent out by the opponent. Gyro Ball is to do damage. Since most people like to play with faster teams and most pokemon do not have a very bad speed Gyro Ball can do some mediocre damage. STAB helps with the Gyro Ball as well. Explosion is to be used to either take out a wall or to suicide since you only have a little health on Forretress and to do great damage at the same time.

Metagross @ Item that increase accuracy (Wide Lense)
Ability: Clear Body
EVs: 252 Atk/ 200 Def/ 58 Speed
Nature:
- Meteor Mash
- Hammer Arm*
- Zen Headbutt*
- Agility
Meteor Mash is going to be to get the STAB and the Attack raise. Zen Headbutt is going to also be for the STAB. It also has 90% accuracy. It also may make the target flinch. Hammer Arms is going to be for the fighting type attack and the 90% accuracy. The speed drop can be recovered with Agility. Agility is to increase my speed to make me a better tank/sweeper

Gengar @ Black Sludge
Ability: Levitate
EVs: 252 Speed/ 252 Sp. Atk/ 6 HP
Nature:
- Shadow Ball*
- Destiny Bond
- Dark Pulse
- Curse
Shadow Ball is for the special defense drop. It is also for the 100% accuracy. The STAB helps with the damage rate. Destiny Bond is in case I know that I am going to die and I need to kill the opponent or else I will lose the whole battle. Dark pulse is for the accuracy and the flinch rate. Curse is to rack up damage on the opponent. With the spikes, curse, and being attacked the opponent has a smaller chance of survival.

Rhyperior @ Life Orb
Ability: Lightning Rod
EVs: 252 Atk/ 126 HP/ 132 Def
Nature:
- Stone Edge*
- Earthquake*
- Megahorn
- Thunderbolt
Stone Edge is for the STAB and the high critical hit rate. Earthquake is for the STAB with the 100% Accuracy. Megahorn is to take out the grass type threats with 120 damage. Thunderbolt is for eliminating most water threats.

Lapras @ Shell Bell
Ability: Shell Armor
EVs: 200 HP/ 240 Sp. Atk/ 70 Speed
Nature:
- Icebeam*
- Surf*
- Ancient Power
- Perish Song
Icebeam can take out any grass type pokes that are threats. It also has 100% accuracy with 95% power. Not only does that help, but the freezing rate can come in use. Surf has the same abilities as Icebeam with attack and accuracy except is for meddling rocks and does not have freeze rate. Ancient Power is to take out thunder type pokemon. It also helps in raising all the stats. 100% accuracy is pleasurable. Perish Song is to piss of the opponent and to help eliminate a poke or cause a switch out.

Togekiss @ Leftovers
Ability: Serene Grace
EVs: 252 HP/ 160 Speed/ 98 Sp. Atk
Nature:
- Wish
- Extreme Speed
- Aura Sphere
- Air Slash
Wish is to heal anything that needs healing. That can either be Togekiss or anyone else on the team. Extreme Speed is for the priority. Aura Sphere is for the perfect accuracy. Air Slash is for the 30% w/o serene grace flinch rate.