Moves
Knock Off functions as a strong, reliable STAB move for Mega Absol that can also remove items such as Blissey's Leftovers and Doublade's Eviolite. Pursuit is another important move that comprises Absol's niche, allowing it to trap threats such as Latias, Chandelure, and Celebi that attempt to switch out in fear of Knock Off or Sucker Punch. Fire Blast is a good coverage move to hit Cobalion, Klefki, and Scizor hard on a potential switch in. Superpower is an alternative that hits Hydreigon, Terrakion, and Mega Sharpedo hard if necessary. Finally, Sucker Punch functions as a useful priority move to revenge kill Choice Scarf variants of Latias as well as pick off weakened Mega Manectric, Starmie, and Mega Aerodactyl, while Iron Tail is a viable alternative that provides a useful coverage move that hits Fairy-types such as Togekiss and Mega Altaria super effectively.
Set Details
Maximum EV investment in Attack and Speed is necessary to maximize Absol's capabilities as an attacker and revenge killer, so it can outspeed Latias and Gengar and Speed tie with Starmie and Mega Houndoom. Justified can allow Absol to switch into Dark-type moves from Pokemon like Choice-locked Krookodile and Hydreigon before Mega Evolving and gain an Attack boost, which can work to its advantage. A Naive nature is ideal if Mega Absol is going to run Fire Blast, but a Jolly nature will be better otherwise. Magic Bounce is Mega Absol's only ability and can be used to bounce back status and entry hazards. However, keep in mind that Mega Absol's immense frailty prevents it from taking advantage of the ability reliably, since it has a very shaky matchup against many of UU's entry hazard setters, such as Cobalion.
Usage Tips
Mega Absol functions mainly as an offensive utility threat; send it in early- or mid-game and use its coverage, Knock Off, and Pursuit to pressure the opposing team. Since it is very frail, it should not switch directly into anything and needs support to get in safely. Double switching with prediction as well as U-turn and Volt Switch support are useful to help it get into battle. However, Mega Absol can be used to aggresively pivot into some entry hazard users like Empoleon and Tentacruel to bounce back entry hazards with Magic Bounce, though this comes at the risk of Mega Absol being severely weakened or potentially crippled by a Scald burn. Mega Absol should be used to Pursuit trap threats such as Latias, Gengar, and Chandelure, so it should remain healthy if its trapping abilities are needed. Mega Absol's coverage moves are useful for punishing its potential switch-ins, such as Hydreigon and Terrakion, possibly weakening them for teammates that have trouble with said Pokemon. If Mega Absol is carrying Sucker Punch in particular, it is wise to play carefully when trying to Pursuit trap certain Pokemon; Choice Scarf variants of Chandelure and Latias not locked into a move can easily revenge kill and defeat Absol if it doesn't use Sucker Punch while they can take Pursuit if they stay in. So in some situations, it may be better to use Knock Off or Sucker Punch to get the KO. When using Mega Absol, read situations carefully to win potential mind games with it and win against Pokemon it is supposed to check. In particular, it is advised not to use Pursuit against Starmie and Choice Scarf Latias unless you have revealed Sucker Punch. If carrying Iron Tail, it is ideal to use it on a predicted Fairy-type switch-in, in order to 2HKO the likes of Mega Altaria, Florges, and Togekiss. When using Fire Blast, it should attempt to stay as healthy as possible to survive a Bullet Punch from Scizor and OHKO it in return. Mega Absol does not sweep teams on its own, so it is best used to weaken its potential checks and trap certain Pokemon to support its team.
Team Options
Mega Absol appreciates U-turn and Volt Switch support to help it get into battle more safely. Rotom-H and Rotom-C are particularly good candidates, since they can lure in Latias, or Celebi in the case of the latter, which are both targets for Mega Absol to trap. Scizor is also a solid teammate, since it can use its slow U-turn to get Mega Absol in more easily, and it also has Bullet Punch to take down Mega Altaria and Togekiss. Infernape appreciates Mega Absol's ability to check Latias and Starmie, assuming Absol carries Sucker Punch. Infernape can also use U-turn to help Mega Absol enter battle and can check Hydreigon and Krookodile if it carries a Choice Scarf. Primarina can deal with Hydreigon and Infernape pretty well while also being a solid wallbreaker that benefits from Absol's ability to trap Gengar and Celebi. Absol also appreciates entry hazard support to wear down threats such as Cobalion and Togekiss, making it easier for Absol to KO them. Good users of entry hazards include Nidoqueen, Cobalion, and Klefki. Pokemon such as Terrakion and Nidoking that benefit from Absol's ability to provide Pursuit support are also good teammates once it has fulfilled its role in play. Other wallbreakers and setup sweepers that benefit from Mega Absol's ability to remove their checks include Volcanion, Bewear, and Suicune, with the latter being an especially good late-game sweeper and appreciating the removal of Latias and Celebi. Volcanion can also support Mega Absol with Defog support and break down bulky Steel-types like Mega Aggron. Chandelure can check Scizor, Cobalion, and Infernape and function as a good sweeper or wallbreaker with Mega Absol. Nihilego can punish Fairy-types barring Klefki with Sludge Wave, and it appreciates Mega Absol's potential ability to lure in and take down Scizor with Fire Blast. Latias, Mimikyu, and Primarina also make great partners, as they can check Fighting-types like Infernape, Terrakion, and Bewear for Mega Absol, while the latter can also remove bulky Steel-types like Mega Aggron and Mega Steelix for Absol.