Moves
High Jump Kick smashes and OHKOes key targets like Heatran, Ferrothorn, Mega Tyranitar, and Kyurem-B and deals huge damage to neutral targets like Magearna, Rotom-Wash, Manaphy, and Mega Scizor. Fake Out helps Mega Medicham wear down and pick off faster Pokemon like Mega Alakazam and Mega Swampert under the rain as well as boosted sweepers like Mega Charizard X, Volcarona, and Gyarados. Ice Punch complements High Jump Kick and breaks through Mega Latias and Flying-types like Landorus-T, Gliscor, and Zapdos. Bullet Punch threatens Mega Diancie, which otherwise forces Mega Medicham out; it also pairs well with Fake Out, enabling Mega Medicham to more effectively finish off the aforementioned faster targets that are put within KO range by Fake Out. Zen Headbutt threatens Toxapex with an OHKO and hits neutral targets like Clefable hard. Lastly, Thunder Punch is Mega Medicham's strongest option against Slowbro and should mainly be used if it is paired with Tapu Koko because a boosted Thunder Punch threatens Slowbro with a 2HKO.
Set Details
A Jolly nature is recommended to Speed tie with Mega Charizard Y and outspeed Kyurem-B and Tapu Lele. An Adamant nature is an option for maximizing Mega Medicham's damage output, letting it OHKO defensive Landorus-T with Ice Punch after Stealth Rock and 2HKO Tapu Fini with Zen Headbutt. Telepathy is Medicham's preferred pre-Mega ability for its situational use to prevent Ditto from copying its damage output in a pinch. Medicham has no use of Telepathy otherwise, since it will regain Pure Power anyway after Mega Evolving.
Usage Tips
The main goal for Mega Medicham is to bring it onto the field safely to wreak havoc against the opposing team. Due to its frailty, Mega Medicham cannot afford to come in against strong neutral attacks. Therefore, it is best to bring Mega Medicham in via aggressive switches, pivot support from U-turn and Volt Switch, or after a teammate has fainted. If Mega Medicham is up against boosted sweepers like Mega Charizard X and Gyarados, it can switch in repeatedly via smart sacrifices and use Fake Out to wear them down and eventually pick them off, preventing them from finishing off the rest of Mega Medicham's team. It is important to keep in mind that Ferrothorn and Heatran, both of which are prime victims of High Jump Kick, occasionally run Protect; therefore, it is a good idea to scout for the move on these two so that Mega Medicham can reduce the risk of mistiming High Jump Kick and take them down. If Mega Medicham has Thunder Punch, try to send it in after Tapu Koko sets up Electric Terrain in order to weaken bulky teams that have Pokemon like Mega Sableye, Clefable, and Slowbro, the latter of which it threatens with a 2HKO.
Team Options
Mega Medicham finds its home on hyper offense, offense, and bulky offense teams, which capitalize on its wallbreaking capabilities so that its teammates can clean up later in the game. Pivot support from Landorus-T, Tornadus-T, Zapdos, Rotom-Wash, and Magearna synergizes perfectly with Mega Medicham, setting the stage for it to cause havoc. Additionally, Magearna reliably handles Mega Alakazam and Tapu Lele, while the others remove entry hazards with Defog. Zapdos also has the benefit of taking on Flying-types like Tornadus-T and Choice Scarf Landorus-T, baiting in Chansey and Mega Tyranitar for Mega Medicham to take down and punishing opposing U-turn with Static. Tapu Koko pairs well for similar reasons and summons Electric Terrain to boost the power of Thunder Punch, allowing Mega Medicham to plow through Slowbro, which otherwise solidly answers it. Kyurem-B clears a path for Mega Medicham by smashing through Flying-type answers like Zapdos and Tornadus-T, while Mega Medicham, in return, steamrolls Steel-types like Ferrothorn and Magearna. Tapu Lele summons Psychic Terrain to boost the power of Mega Medicham's Zen Headbutt and protect it from priority moves like Mega Scizor's Bullet Punch, and together, they overwhelm each other's defensive answers. Keep in mind that Mega Medicham is unable to use Fake Out and Bullet Punch against grounded targets while Psychic Terrain is active. Hawlucha also forms a solid core with Mega Medicham despite adding up on the Fighting typing, with Mega Medicham softening shared Fairy-type answers like Clefable and Tapu Fini, paving a way for Hawlucha to clean up late-game. Ash-Greninja sets up Spikes to further enable both it and Mega Medicham's wallbreaking capabilities, and it handles bulky Psychic-types that Mega Medicham struggles against, like Slowbro, Cresselia, and Reuniclus. Tapu Fini's Misty Terrain pairs beautifully with Mega Medicham, protecting it from attempted status ailments like Toxic or Scald burns from Toxapex and paralysis from Zapdos's Static. Volcarona enjoys Mega Medicham's ability to break past Chansey, Toxapex, and Heatran, paving the way for Volcarona to sweep late-game. Weavile traps and eliminates bulky Psychic-types like Slowbro, Cresselia, and Reuniclus with Pursuit, removing a major obstacle for Mega Medicham to wallbreak. Offensive Grass-types like Kartana, Serperior, and Tapu Bulu also pair well with Mega Medicham, as they can smash through defensive answers like Slowbro and Cresselia and overwhelm each other's shared checks like Tornadus-T. Choice Scarf variants of Kartana provide a solid cleaning option against faster targets like Mega Alakazam, Tapu Koko, and Choice Scarf Tapu Lele, while Choice Band and Swords Dance sets work together with Mega Medicham in heavily pressuring bulky structures. Serperior provides paralysis support with Glare, letting Mega Medicham threaten faster checks like Tornadus-T. Additionally, both Kartana and Serperior provide Knock Off support to remove items like Leftovers from Clefable and Rocky Helmet from Skarmory, allowing Mega Medicham to break through them more easily.