Introduction Considering it is one of the four Guardian Deities of Alola, it is definitely no joke to face against in the OU tier! Sporting a massive base 130 Attack stat and a solid 115 base Defense stat makes it pretty hard to bring it from the Physical side without strong super-effective moves.This is further backed up by a useful signature ability- Grassy Surge that calls in Grassy Terrain whenever the Pokemon is brought to the field. This slightly heals all grounded Pokemon every turn as well as reduce the effectiveness of the move Earthquake which is a very notable move in competitive Pokemon. Grassy Terrain also boosts its Grass-types moves by 50% which only increases its potential as a wallbreaker. Combine this with moves like Horn Leech, Superpower, Zen Headbutt, Bulk Up and Leech Seed and what we have is a powerful Pokemon that is able to to make the most of its stats and usable movepool. All isn't fine for this angry guardian though, It extremely exploitable on the Special side due to its low Special Defense, with moves like Ice Beam, Flash Cannon, Sludge Wave, and Fire Blast ever so common in the tier, sometimes it gets hard for it really do enough. And 75 base Speed makes it slower than several of the wallbreakers in the tier. And with almost all of its sets running an Adamant nature, it is very easy to revenge kill if it doesn't happen behind a Substitute. Sets King Crimson (Choice Band) Tapu Bulu @ Choice Band Ability: Grassy Surge EVs: 252 Atk / 4 Def / 252Spe Adamant Nature - Wood Hammer - Horn Leech - Zen Headbutt / Megahorn - Superpower / Stone Edge Choice Band Tapu Bulu is by far the most common and most effective set in the OU tier as very few survive a 2HKO from it with the right move, especially with Stealth Rock on. Wood Hammer is its main STAB and it hits everything not a Steel or Grass for loads of damage. Thanks to Grassy Terrain, it is so powerful that even the Latwins aren't spared from an OHKO after Stealth Rock damage. Horn Leech is another STAB move that does a nifty amount damage all around and help it leech off health from its opponents that it would have lost due to Wood Hammer recoil and otherwise. It is worth noting, that Horn Leech can be replaced with any other of the mentioned coverage moves if recoil isn't too big a problem for the given team. The following two moveslots help Tapu Bulu to round off its coverage. As Tapu Bulu doesn't have access to Play Rough to fully round off its STAB it has make do of what other coverage it has, and that doesn't disappoint. Zen Headbutt can be used to get rid of pesky bulky Grass/Poison walls namely- Mega Venusaur and Amoonguss which would otherwise be a full stop to Tapu Bulu as a whole. The move helps it immensely by scoring a 2HKO after Stealth Rock damage. The only thing bad about the move itself that it might miss due to its imperfect accuracy. Megahorn on the other hand takes care of Pokemon like Tangrowth, Celebi, Mew and Cresselia that otherwise take pretty low damage from any other of the moves. The final slot is reserved for either Superpower or Stone Edge. Superpower wrecks many of the common Steel-types that believe they well tank a hit from this beast. Examples being Celesteela, Ferrothorn, Skarmory and Heatran. Stone Edge is a more or less a lure for the many Fire- and Flying- types that think could otherwise switch into it for very less damage and KO it. Pokemon like that include Mega Charizard X, Mega Charizard Y, Mega Pinsir, Alolan Marowak and Zapdos. The EVs are pretty straightforward. 252 EVs in Attack with an Adamant nature puts it to 394 Attack, this when boosted with a Choice Band helps it to generate destructive amounts of damage. 252 EVs in Speed puts it to 249 in Speed which gives it enough to outrun most key threats like Adamant Bisharp, Modest Volcanion, Defensive Landorus-T, and walls like Chansey, Tapu Fini, Toxapex and Clefable. Leech Seed Tapu Bulu @ Leftovers Ability: Grassy Surge EVs: 152 HP / 252 Atk / 104 Spe Adamant Nature - Leech Seed - Substitute / Bulk Up - Horn Leech - Brick Break / Superpower This set makes use of Tapu Bulu's immense physical bulk as a means of setting up multiple Leech Seed to leech off health from passive threats like Pokemon like Chansey, Toxapex, and such. The next slot has either Bulk Up or Substitute. Bulk Up is there to bolster Tapu Bulu's already high Attack and Defense to nuclear levels and make killing it harder from the Physical side and it also increases Tapu Bulu staying power enabling it to collect more Bulk Up boosts. Substitute can be used in conjunction with Leech Seed and Protect to help stall out most passive threats bar Mega Sableye and Bulky Grass-Types. It also helps it to avoid status from threats like Mega Sableye and Toxapex. Horn Leech is Tapu Bulu's most reliable STAB in such cases. This furthers its staying ability and hits pretty hard under Grassy Terrain, by the time Grassy Terrain has ended, it would have probably collected enough boosts to keep hitting at a similar pace. It is much more useful if Leech Seed isn't chosen as well. The final slot can be used for either Brick Break or Superpower. Brick Break is used to reliably hit most Steel-types, like Ferrothorn and Heatran. Brick Break is preferred over Superpower here as the former lacks the stat drops of the latter. However Superpower can be used for the immediate power it provides. And it can be patched up by the Bulk Up boosts if it has it. The Speed EVs let it hit 212 Speed which lets it outrun Standard Rotom-Wash and anything below. 252 Attacks EVs with an Adamant nature gives it maximum overall damage output. The rest of the EVs are dumped into HP to give it enough bulk to setup Bulk Up. Other Options Choice Band and Bulk Up sets aside, It is also known to function as a fine revenge killer with a Choice Scarf and a Jolly Nature with the same moveset as the Choice Band set. If you prefer more flexibility you can use a Life Orb to switch moves at the cost of losing health every turn. However with Grassy Terrain mildly healing you every turn it is present, it is less punishing on the recoil. You can also opt for an Expert Belt if Life Orb's recoil isn't to your taste and it also helps you to bluff a Choice Band. Nature's Madness can be used to soften would be counters and get into KO range of Wood Hammer in most cases, the most prominent case being against Marowak-A. Taunt is also a useful addition, it helps shut down that depend a lot on non-damaging moves, such as Clefable and Chansey or slow hazard such as Defensive Landorus-T and Skarmory. Checks and Counters Bulky Grass-Types: Bulky Grass Pokemon like Mega Venusaur, Tangrowth and, Amoonguss are generally full stops to Tapu Bulu unless it has a specified move to dispatch off them. Even then, they are only at most only a 2HKO. With that said bothe Mega Venusaur and Amoonguss can KO it back with Sludge Bomb. Having teammates like Heatran, Specially Defensive Mandibuzz, Mega Charizard X and Y, and Tapu Lele help taking against these threats. Bulky Steel-Types: Celesteela and Skarmory has a solid double resistance to Grass and take neutral damage from Stone Edge and Superpower ending up in a chance to 2HKO. Making them pretty great checks if they happen to come on in a resisted move with Tapu Bulu is locked into. They can also can in at full health to dispatch off it with Heavy Slam / Fire Blast and Brave Bird respectively. While Heatran and Ferrothorn don't appreciate coming into a Superpower or a boosted Brick Break, they can still come in on any move and quickly take care of with Lava Plume / Flash Cannon and Gyro Ball. Magnezone is definitely the best partner when it comes to trapping and dispatching off the Steel-Type threats mentioned above. Heatran, unless with an Air Balloon can be trapped specifically by Dugtrio. Bulky Fire-Types: Bulky Will-o-Wisp Charizard only truly fears a Stone Edge from Tapu Bulu otherwise it can freely come in any other moves and burn it with Will-o-Wisp. Dragon Dance variants gain free setup turns on resisted hits and make quick work of Tapu Bulu. Mega Charizard Y can come on in any move bar Stone Edge (assuming there aren't any Stealth Rocks on) and OHKO Tapu Bulu with a Fire Blast. Heatran can come on any moves bar Superpower and Brick Break and proceed to OHKO with a Super Effective Fire- or Steel-Type move. In such cases, Bulky Water-types for teammates are your best bet against these nuclear warheads. Quagsire, Suicune, Azumarill, Tapu Fini can check Charizard X to an extent. The same group can check Heatran as well given it doesn't have Grassium Z or Power Herb with Solar Beam to lure such threats out. Hippowdon also helps to check against Charizard X. Charizard Y can be taken care of with Specially Defensive Toxapex and Chansey. Scarf Tyranitar can Pursuit-trap it downright OHKO it with Stone Edge given it doesn't switch into a Focus Blast. Choice Specs or Choice Scarf Keldeo can take care of these Fire-types with it strong Hydro Pump. The Latwins check Charizard Y as well, and can very well threaten it back with Psyshock. Offensive Poison-Types: Glass cannons like Gengar and Salazzle have access to the strong Poison-Type moves such as Sludge Bomb and Sludge Wave which can take out Tapu Bulu in one hit, making them useful revenge-killers. However they can't reliably switch in to Tapu Bulu. Bulky-Ground types like the likes of Gastrodon and Hippowdon have an easier time switching in against and taking care of the aforementioned threats with Earthquake. Scarf Excadrill can revenge-kill these threats as well. Specially Defensive Toxapex is almost always a full stop against these two.