Because alliteration is cool
Introduction
I've had an affinity for underrated Pokemon for a while now. This team showcases a good example of a Pokemon that deserves to be used more than it is. That Pokemon's name is Porygon2. Combine excellent Defenses with Eviolite, a nice base 105 Special Attack, and a fun ability in Trace and you have Porygon2.
Team-Building Process
Introduction
I've had an affinity for underrated Pokemon for a while now. This team showcases a good example of a Pokemon that deserves to be used more than it is. That Pokemon's name is Porygon2. Combine excellent Defenses with Eviolite, a nice base 105 Special Attack, and a fun ability in Trace and you have Porygon2.
Team-Building Process

I started off with the star of the show, Porygon2.


Next, Breloom was added to stop Sciztom, check bulky Waters, and absorb status.



Then, Slowbro was added to be a Physical wall




Since I have a Physical wall, I need a Special wall, too. That's where Jirachi comes in.





Next, Dragonite was added to check common Sun Pokemon.






Then, I decided on Infernape to set up SR, scout, and stall-break.






Later, I was made aware of how hazards could be a problem, so I needed to add a spinner. Infernape was the most replacable Pokemon on my team, so Donphan was added to not only spin, but set up SR and check Toxicroak. However, I was missing a stall-breaker, so I switched Dragonite for Salamence.
The Team
Donphan (M)
Trait: Sturdy
EVs: 252 HP / 252 Def / 4 SDef
Impish Nature (+Def, -SAtk)
Stealth Rock
Rapid Spin
Earthquake
Toxic
Description: Donphan does little besides Spin and set up SR. The only other thing he contributes is checking Toxicroak. Toxic is here to nail common bulky Water switch-ins, especially Jellicent. Plus, Ice Shard is depressingly weak. I ran Infernape before, but it was pointed out to me how much my team would appreciate Spin support, so that's why Donphan is here. I could've run a different spinner, such as Starmie, but then I'd have 2 Water/Psychics on my team, and the only other place I could fit SR on would be Jirachi, and all of his moves are important to me. His Water, Ice, and Grass weaknesses are covered by Salamence, Slowbro, Jirachi, and Breloom.
Breloom (M)
Trait: Poison Heal
EVs: 236 HP / 212 SDef / 60 Spd
Careful Nature (+SDef, -SAtk)
Spore
Bulk Up
Drain Punch
Seed Bomb
Description: Breloom is here primarily to check the Sciztom teams that are even more annoying than they are common. Prepare to be hit with a Spore, essentially eliminating a Pokemon due to the new Sleep mechanics. Have fun dealing with Breloom after a Bulk Up boost, too. Since Porygon2 is Trick-bait, Breloom is amazing at punishing my opponent by letting them have his Toxic Orb. Breloom's other job is to check bulky Waters, Ferrothorn, Tyranitar, etc. Not only can jr be a dangerous sweeper, but he also provides valuable status absorbing and sleep spreading support. His Fire, Flying, Psychic, Poison, and Ice are covered by Slowbro, Jirachi, Salamence, and Donphan.
Salamence (M)
Trait: Intimidate
EVs: 252 Atk / 4 SAtk / 252 Spd
Hasty Nature (+Spd, -Def)
Dragon Dance
Dragon Claw
Fire Blast
Earthquake
Description: Salamence is my main check to Sun teams and Breloom. I wanted something to not only do this, but destroy the annoying Skarmbliss/Blisscor cores, so Salamence was perfect for the job. I have Dragon Claw over Outrage to be able to switch between moves, allowing me to stall-break better. Fire Blast is for Skarmory, Gliscor, Ferrothorn, etc. EQ is to round finish off my coverage and OHKO Heatran and Ninetales. Lum Berry is to save sweeps. I originally ran Dragonite to check Sun teams, but since I needed a Spinner, I ended up replacing my stall-breaker, Infernape, and this Salamence set seemed like the best option to me. His Ice, Rock, and Dragon weaknesses are covered by Donphan, Breloom, Jirachi, and Slowbro.
Porygon2
Trait: Trace
EVs: 252 HP / 184 Def / 72 SDef
Bold Nature (+Def, -Atk)
Thunderbolt
Ice Beam
Thunder Wave
Recover
Description: Now we've reached the digital Pokemon of the hour, Porygon2. Eviolite raises his already decent Defenses to amazing heights. Pory2's Trace ability lets me have some fun trolling opponents. He Intimidates Gyarados and Salamence right back before slamming them with 4x Super Effective moves. He gives Heatran and Chandelure a taste of their own medicine by copying Flash Fire. Copying things like Multiscale, Levitate, Poison Heal, Natural Cure, etc is pretty great, too. Not only is Porygon2 a great mixed back-up wall and an ability troll, but it can hit back with Boltbeam. I'm using Tbolt over Discharge because it hits harder. His Fighting weakness is covered by Slowbro and Salamence.
Jirachi
Trait: Serene Grace
EVs: 252 HP / 252 SDef / 4 Spd
Careful Nature (+SDef, -SAtk)
Body Slam
Iron Head
Fire Punch
Wish
Description: Jirachi is both my Special wall and a support Pokemon. It checks Pokemon such as Tornadus, Reuniclus, Gengar, Lati@s, and so on. Rachi also provides valuable Wish and Paralysis support. Fire Punch is to punish Ferrothorn, Magnezone, and Scizor that think they can switch into me safely in addition to having something else to hit Gengar with after Disable. I've had many matches where Jirachi saves the day with his amazing hax and Wishing. I don't run the standard Speed EVs because I don't run Ice Punch, so why bother with Gliscor when I could have more bulk? His weaknesses to Fire and Ground are covered by Salamence, Breloom, and Slowbro.
Slowbro (F)
Trait: Regenerator
EVs: 252 HP / 252 Def / 4 SAtk
Relaxed Nature (+Def, -Spd)
Scald
Ice Beam
Psychic
Slack Off
Description: Slowbro is my favorite Physical wall, and for good reason. He has a few things that Skarmory and Gliscor don't. First of all, he has Regenerator. Should I get low on health, I can just switch out and have 1/3 replenished. He's also one of the best Terrakion checks out there. With 29 Speed IVs, he's slower than Conkeldurr, so he takes less damage from Payback before hitting back with STAB Psychic. He can spread Burns with Scald and doesn't care about Ice Punches or HP Ices like Gliscor. Similarly, he doesn't care about surprise Fire moves like Skarmory does. At least one of his weaknesses are covered by each member of the rest of the team.

Donphan (M)

Trait: Sturdy
EVs: 252 HP / 252 Def / 4 SDef
Impish Nature (+Def, -SAtk)




Description: Donphan does little besides Spin and set up SR. The only other thing he contributes is checking Toxicroak. Toxic is here to nail common bulky Water switch-ins, especially Jellicent. Plus, Ice Shard is depressingly weak. I ran Infernape before, but it was pointed out to me how much my team would appreciate Spin support, so that's why Donphan is here. I could've run a different spinner, such as Starmie, but then I'd have 2 Water/Psychics on my team, and the only other place I could fit SR on would be Jirachi, and all of his moves are important to me. His Water, Ice, and Grass weaknesses are covered by Salamence, Slowbro, Jirachi, and Breloom.

Breloom (M)

Trait: Poison Heal
EVs: 236 HP / 212 SDef / 60 Spd
Careful Nature (+SDef, -SAtk)




Description: Breloom is here primarily to check the Sciztom teams that are even more annoying than they are common. Prepare to be hit with a Spore, essentially eliminating a Pokemon due to the new Sleep mechanics. Have fun dealing with Breloom after a Bulk Up boost, too. Since Porygon2 is Trick-bait, Breloom is amazing at punishing my opponent by letting them have his Toxic Orb. Breloom's other job is to check bulky Waters, Ferrothorn, Tyranitar, etc. Not only can jr be a dangerous sweeper, but he also provides valuable status absorbing and sleep spreading support. His Fire, Flying, Psychic, Poison, and Ice are covered by Slowbro, Jirachi, Salamence, and Donphan.

Salamence (M)

Trait: Intimidate
EVs: 252 Atk / 4 SAtk / 252 Spd
Hasty Nature (+Spd, -Def)




Description: Salamence is my main check to Sun teams and Breloom. I wanted something to not only do this, but destroy the annoying Skarmbliss/Blisscor cores, so Salamence was perfect for the job. I have Dragon Claw over Outrage to be able to switch between moves, allowing me to stall-break better. Fire Blast is for Skarmory, Gliscor, Ferrothorn, etc. EQ is to round finish off my coverage and OHKO Heatran and Ninetales. Lum Berry is to save sweeps. I originally ran Dragonite to check Sun teams, but since I needed a Spinner, I ended up replacing my stall-breaker, Infernape, and this Salamence set seemed like the best option to me. His Ice, Rock, and Dragon weaknesses are covered by Donphan, Breloom, Jirachi, and Slowbro.

Porygon2

Trait: Trace
EVs: 252 HP / 184 Def / 72 SDef
Bold Nature (+Def, -Atk)




Description: Now we've reached the digital Pokemon of the hour, Porygon2. Eviolite raises his already decent Defenses to amazing heights. Pory2's Trace ability lets me have some fun trolling opponents. He Intimidates Gyarados and Salamence right back before slamming them with 4x Super Effective moves. He gives Heatran and Chandelure a taste of their own medicine by copying Flash Fire. Copying things like Multiscale, Levitate, Poison Heal, Natural Cure, etc is pretty great, too. Not only is Porygon2 a great mixed back-up wall and an ability troll, but it can hit back with Boltbeam. I'm using Tbolt over Discharge because it hits harder. His Fighting weakness is covered by Slowbro and Salamence.

Jirachi

Trait: Serene Grace
EVs: 252 HP / 252 SDef / 4 Spd
Careful Nature (+SDef, -SAtk)




Description: Jirachi is both my Special wall and a support Pokemon. It checks Pokemon such as Tornadus, Reuniclus, Gengar, Lati@s, and so on. Rachi also provides valuable Wish and Paralysis support. Fire Punch is to punish Ferrothorn, Magnezone, and Scizor that think they can switch into me safely in addition to having something else to hit Gengar with after Disable. I've had many matches where Jirachi saves the day with his amazing hax and Wishing. I don't run the standard Speed EVs because I don't run Ice Punch, so why bother with Gliscor when I could have more bulk? His weaknesses to Fire and Ground are covered by Salamence, Breloom, and Slowbro.

Slowbro (F)

Trait: Regenerator
EVs: 252 HP / 252 Def / 4 SAtk
Relaxed Nature (+Def, -Spd)




Description: Slowbro is my favorite Physical wall, and for good reason. He has a few things that Skarmory and Gliscor don't. First of all, he has Regenerator. Should I get low on health, I can just switch out and have 1/3 replenished. He's also one of the best Terrakion checks out there. With 29 Speed IVs, he's slower than Conkeldurr, so he takes less damage from Payback before hitting back with STAB Psychic. He can spread Burns with Scald and doesn't care about Ice Punches or HP Ices like Gliscor. Similarly, he doesn't care about surprise Fire moves like Skarmory does. At least one of his weaknesses are covered by each member of the rest of the team.
Threats
The only thing that I've been unable to handle is Scrafty. Thankfully, he's been dropping in usage, but it still a threat.