- Pokémon's accuracy cannot be lowered.
Level 100 Statistics (see level 5, 50, 100)
As you might expect of such an ubiquitous Pokemon in-game, Pelipper is not particularly amazing. However, while many of such common Pokemon are usually extremely lackluster, Pelipper is surprisingly decent. His rare typing gives him access to a fantastic STAB combination that's only resisted by Lanturn in UU and a slew of interesting resistances that allow him to check a few common Pokemon in the UU metagame. Additionally, his stats, while not top-notch, are not really poor; a great Defense stat and passable Special Attack give him the ability to be a decent tank. He also has access to all the right moves that allow him to perform his role well. All in all, while Pelipper may seem like another mediocre Water-type that's outclassed by bulkier alternatives such as Milotic, Pelipper has more than enough unique traits to distinguish himself from them and is still somewhat competitively viable.
Boasting a respectable Special Attack stat and a fantastic STAB combo that hits everything in UU neutrally barring Lanturn, Pelipper becomes a strong user of a Life Orb. Additionally, Pelipper is a fairly bulky user of the item, as he has plenty of resistances to switch in on, great physical Defense, and Roost, all of which allow him to switch in multiple times and wreck the opposing team with powerful attacks. While his Speed and Special Attack stat are not quite up to par with some of his fellow Water-types, the aforementioned traits allow him to stand out amongst the crowd and give him competitive viability.
After a STAB and Life Orb boost, Hydro Pump hits fairly hard, especially coming off of Pelipper's maxed out Special Attack stat. Additionally, it has fantastic neutral coverage, only resisted by Grass-, Water-, and Dragon-types, the last of which are rare in UU. Air Slash covers the Grass-types that resist Hydro Pump, and forms a strong neutral attacking combination alongside it. If your opponent happens to have both a Water- and Grass-type on their team, Air Slash is also a decent option to nail either for respectable damage. Roost gives Pelipper some extra longevity by allowing him to shrug off damage from Stealth Rock, Life Orb recoil, and resisted or weak neutral attacks. Hidden Power Grass nails Water-types for decent damage. While it certainly won't do enough to KO healthy bulky Water-types, it is more than capable of KOing weakened ones. Surf is an option over Hydro Pump if you're wary of its low accuracy and PP, but using Surf results in a massive loss of power.
Team Options & Additional Comments >>>
Pelipper is blessed with an excellent Defense stat, an interesting typing, and a reliable recovery move in Roost, which all assist him in acting as a check to multiple Pokemon in the UU metagame. These include prominent Pokemon such as Arcanine, Leafeon, Donphan, and Azumarill. Though these Pokemon can pack attacks that can dispose of Pelipper (Arcanine can carry Thunder Fang, for example), they typically won't have them, which makes him a decent answer to such Pokemon. Surf is Pelipper's obligatory STAB move, and its ability to hit many important threats such as Donphan and Arcanine is appreciated. Air Slash compliments Surf well, and broadens the field of opponents that Pelipper can successfully check by hitting Pokemon that Surf fails to strike for strong enough damage, such as Leafeon and Hitmontop. Roost greatly increases Pelipper's overall longevity, and its secondary effect of removing Pelipper's Flying typing can be greatly appreciated against some foes. Hidden Power Grass rounds off the set by smacking physical Water-types such as Feraligatr and Azumarill for super effective damage. However, Toxic is a respectable option to deal with bulkier Pokemon such as Milotic, and it's Pelipper's best option against foes he can't touch, such as Rotom. If Toxic is used, it's recommended to replace Air Slash with Hidden Power Grass, as Pelipper has more success checking physical Water-types than Fighting-types since they will usually carry a devastating Stone Edge that Pelipper will have trouble taking.
Team Options & Additional Comments >>>
Pelipper has a movepool that's fairly large, and as such, there are plenty of other options to choose from. Offensively, Pelipper boasts a surprisingly large physical movepool; powerful moves such as Gunk Shot, Seed Bomb, U-turn, Payback, and Fly are usable with a Life Orb or Choice Band. However, Pelipper's lack of strong physical STAB options and poor Attack stat make this a lackluster choice. While Ice Beam may seem like an appetizing option on special sets, it's usually a poor choice since Pelipper can use STAB Air Slash to hit most of the things that Ice Beam is designed to hit. Pelipper also has the option of using Choice Specs or Choice Scarf, but Pelipper's weakness to Stealth Rock undermines this option. Also, Pelipper has more success abusing his great coverage with his STABs, so he prefers the ability to switch attacks. Pelipper also has access to two boosting moves in Stockpile and Agility. Agility allows Pelipper to act as a decent late-game cleaner, and while Pelipper isn't nearly as effective in that role as other Pokemon, he still does a respectable job at it. Stockpile gives Pelipper a way to boost his excellent Defense and mediocre Special Defense; however, even after one boost, Pelipper's Special Defense isn't good enough to take most reasonably powerful special attacks. Finally, Knock Off is an option to remove opposing Pokemon of their items, but it's typically a wasted moveslot since Pelipper has much better options to use.
Checks and Counters
Despite Pelipper's excellent type coverage, he is unfortunately hindered by his average Special Attack. This makes it so that most special walls will have no problems taking his attacks and crippling him with a status ailment, or simply just forcing him out, which can cause Pelipper to have to take Stealth Rock damage when he switches in again. In addition to this, bulky Water-types don't really mind any of his attacks, bar the rare Toxic, and will eventually stall him out, even if they don't have Toxic themselves. Lanturn is by far the most effective bulky Water-type, boasting a resistance to both of Pelipper's STAB moves and a STAB Thunderbolt that can dispatch Pelipper with ease. While Pelipper has a great Defense stat, his Special Defense is lackluster, so any Pokemon who can target his lesser defensive stat can threaten him. Rotom is particularly effective due to its ability to block Pelipper's teammates from Rapid Spinning, in addition to posing a huge threat to him with a lethal STAB Thunderbolt. Pelipper's low Speed is also a hinderance, as it makes it extremely easy to revenge kill him. Finally, Stealth Rock is a huge obstacle for Pelipper, as the loss of 25% of his health each time he switches in can make it extremely difficult for him to switch in.