Moves
Head Smash is Tyrantrum's main STAB attack and is strong enough to 2HKO Bronzong, meaning only the bulkiest of Pokemon that resist Rock can hope to stomach it. Outrage dents Ground- and Fighting-types looking to resist Head Smash, heavily damages Donphan, 2HKOes Rhyperior after Stealth Rock damage, and is accurate, unlike Head Smash. Earthquake's main use is to smash Pokemon like Registeel and Steelix that can take Tyrantrum's STAB moves.
Tyrantrum's last moveslot is largely filler, and it is mostly used to help Tyrantrum continue wallbreaking targets while still making it difficult for checks to switch in. Superpower helps to take out bulky Pokemon such as Umbreon and Snorlax while still deterring Steel-types such as Bronzong and Registeel from switching in. Crunch can be used to 2HKO specially defensive Cresselia without the risky effects of Head Smash and Outrage as well as cripple Bronzong. Dragon Claw is an option by virtue of simply being a safe STAB move to throw out, notably being able to damage Head Smash switch-ins without locking into Outrage, but its wallbreaking power is low otherwise.
Set Details
An Adamant nature with a Choice Band maximizes Tyrantrum's damage output against bulky Pokemon. A Jolly nature may be used to get the drop on the 242 speed tier, which includes relevant Pokemon like Florges, Mandibuzz, and Cresselia.
Usage Tips
Tyrantrum primarily targets slower Pokemon, against which it can use Head Smash and brutalize any Pokemon that doesn't resist the move. Head Smash's obscene power and lack of a crippling drawback aside from accuracy mean this will be Tyrantrum's most used attack. While Tyrantrum can predict the opponent's switch to a bulky Pokemon that resists Rock and use its other moves to nail them coming in, the best time for Tyrantrum to use its coverage moves is if they can KO the initial target while covering the switch at the same time. Since the opponent will rarely have more than one Pokemon that can take Head Smashes well, Tyrantrum usually only needs to get a single correct prediction to be free to spam Head Smash throughout the match. Against more offensive teams, Tyrantrum is not expected to survive for long due to its middling Speed and common weaknesses. Thus, it should focus on busting open a huge hole whenever it can, taking advantage of any slower or offensively weaker Pokemon on the opponent's team as well as the fact that they do not possess good switch-ins to Tyrantrum.
Team Options
Fast Pokemon that can clean games, such as Swellow, Dragon Dance Zygarde-10%, Salazzle, and Yanmega, make great partners to Tyrantrum, as these Pokemon greatly appreciate Tyrantrum softening up the foe's team to have an easier time sweeping. Tyrantrum can also lure out and weaken or KO problematic Pokemon for these sweepers, such as Bronzong and Rhyperior, as well as provide mild defensive synergy with Salazzle, as it resists Fairy-, Steel-, and Ice-type moves for it. Tyrantrum especially appreciates VoltTurn support to be able to switch into bulky Pokemon with minimal risk and can be provided by fast Pokemon such as Swellow, Noivern, Raikou, and Flygon. Tyrantrum also benefits from many forms of speed control, such as Sticky Web and paralysis, to gain an advantage against faster targets, making any potential users of these moves, such as Galvantula, Cresselia, Slowbro, and Porygon2 helpful teammates.