Title speaks for itself. I tried to look for advice on the UU room and the RMT room in Showdown, but no one would help me (except for one kind gentleman named "bow for glory". So maybe here I could get some help?
These three formulated an attacking force that seemed legitimate to me.
Aerodactyl was the fastest mon I could find that could Pursuit problematic Psychic-types, not to mention being able to decently damage Amoonguss after something was sleep foddered
Celebi is here primarily for Suicune, its ridiculous fatness allows it to easily drool all over me (literally, too – he is spewing red-hot spit at me, which is pretty disgusting)
Forretress is filler mostly, as Spikes + Stealth Rock would ease the job of the attacking force, and Rapid Spin clears Stealth Rock for Aerodactyl. Ridiculous physical bulk also allows effective manhandling of enemy Aerodactyl.
Philosophy behind selecting the particular mons have been elaborated already, so I will be elaborating on move choice.
Aerodactyl @ Aerodactylite
Ability: Unnerve
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Stone Edge
- Wing Attack
- Earthquake
- Pursuit
Celebi @ Leftovers
Ability: Natural Cure
EVs: 40 HP / 216 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Giga Drain
- Hidden Power [Fire]
- Nasty Plot
Gengar @ Life Orb
Ability: Cursed Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Sludge Wave
- Shadow Ball
- Focus Blast
- Taunt
Forretress @ Leftovers
Ability: Sturdy
EVs: 248 HP / 252 Def / 8 SpD
Impish Nature
IVs: 0 Spe
- Gyro Ball
- Rapid Spin
- Spikes
- Stealth Rock
Krookodile @ Choice Band
Ability: Moxie
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Earthquake
- Knock Off
- Superpower
- Pursuit
Primarina @ Choice Specs
Ability: Torrent
EVs: 248 HP / 252 SpA / 8 Spe
Modest Nature
IVs: 0 Atk
- Hydro Pump
- Moonblast
- Ice Beam
- Hidden Power [Electric]
Enemy Gengar is still pretty troublesome – it's not hard to take down both Pursuitters on this team, and if they go down, Gengar can go to town.
Hydreigon can U-turn on allies like Celebi, so switch-ins like Primarina have to deal with whatever teammate is coming next.
Scizor can survive one HP Fire (if no Nasty Plot) and if it gets healed later, Celebi's death was for naught.
Bisharp has massive DPS and can take out Krookodile (+ everyone on the team) with Sucker Punch given enough prior damage.
No switch-ins.
Is Autism incarnate (very unnerving to look at). Also tough to safely switch-into and manhandle.
These three formulated an attacking force that seemed legitimate to me.
- Gengar would attack the Grass-types that gave Primarina trouble
- Krookodile would attack the Electric-types that gave everyone problems (+ Volcanion)
- Primarina would just function as a Water + Fairy – and Fairy would stop Dark-types that Gengar didn't like
Aerodactyl @ Aerodactylite
Ability: Unnerve
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Stone Edge
- Wing Attack
- Earthquake
- Pursuit
- Dual STAB for maximum potential in attacking mons with less defenses
- Wide coverage available, had to choose carefully
- Pursuit was deemed the most appropriate choice, seeing as troublesome enemies such as Latias and Gengar gave me a run for my money
- Earthquake chosen because I required a fast way to fight Bisharp – Fire Fang deemed unnecessary due to Celebi's HP Fire
Celebi @ Leftovers
Ability: Natural Cure
EVs: 40 HP / 216 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Psychic
- Giga Drain
- Hidden Power [Fire]
- Nasty Plot
- Nasty Offensive set chosen to give fat enemies (especially Suicune, Amoonguss, and Scizor) and more difficult time
- Hidden Power Fire selected due to a high need to deal massive damage to Scizor
- Besides just attacking, it possesses respectable defense and an ability which made it stand out to me over other attackers (such as Alakazam) – it worked better that way considering Aerodactyl was on the team already
Gengar @ Life Orb
Ability: Cursed Body
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Sludge Wave
- Shadow Ball
- Focus Blast
- Taunt
- Dual STAB chosen due to lack of good Ghost resists (sans enemy Krookodile), with Poison STAB chosen to stop Grass-types (not Sludge Bomb because then Chesnaught walls me)
- Krookodile is stopped with Focus Blast – also does a good job standing up to Coballion, and achieves near-impeccable neutral coverage with Ghost STAB
- Taunt is chosen utility because other options weren't overly appealing to me – Will-O-Wisp, Destiny Bond, Substitute, etc. looked good, but Taunt chosen because I needed a way to stop enemy walls from using their harassing moves (Spore, Rest, Soft-Boiled), easing job for team's attackers
Forretress @ Leftovers
Ability: Sturdy
EVs: 248 HP / 252 Def / 8 SpD
Impish Nature
IVs: 0 Spe
- Gyro Ball
- Rapid Spin
- Spikes
- Stealth Rock
- Gyro Ball is chosen attacking move because it was needed to swiftly eliminate enemy Aerodactyl
- Hazards selected due to lack of other options and the fact that hazards seemed appealing to ease the job of the team's attackers
- Rapid Spin needed to clear hazards – especially helpful for Aerodactyl
Krookodile @ Choice Band
Ability: Moxie
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Earthquake
- Knock Off
- Superpower
- Pursuit
- Choice Scarf considered, but Band eventually chosen due to the need of a powerful physical attacker and could easily demolish those who go second if Moxie activates (not to mention Intimidate triggers Defiant on Bisharp, which is something I don't need)
- Krookodile also needed as a countermeasure to Bisharp – resists Sucker Punch and outspeeds Bisharp. Also can act as a countermeasure to Electrics because HP Ice doesn't OHKO.
- Choice Scarf Gengar who is stuck with either STAB gets Pursuitted by Krookodile, and Life Orb/Choice Specs Gengar who is stuck with Focus Blast will get Pursuitted by Aerodactyl
- Superpower to lure Hydreigon, who is otherwise quite threatening if Primarina is down
Primarina @ Choice Specs
Ability: Torrent
EVs: 248 HP / 252 SpA / 8 Spe
Modest Nature
IVs: 0 Atk
- Hydro Pump
- Moonblast
- Ice Beam
- Hidden Power [Electric]
- Dual STAB nigh-unresisted by few – exceptions include Amoonguss and Venusaur
- Ice Beam can heavily damage Amoonguss – it does heavy damage to assist Gengar and Krookodile in taking down the shroom, so I don't have to sleep fodder something and then deploy Aerodactyl
- Max HP selected because a) speed is already pretty bad and b) allows Primarina to act as a more durable switch-in to problematic enemy Fire-types (i.e. Arcanine and Infernape) plus Hydreigon
- HP Electric chosen because alternative options are few and it can handle Volcanion pretty well