Kangaskhan

With solid bulk for an attacker, just enough Speed, a high Attack stat backed up by Parental Bond, and an offensive typing resisted by few relevant threats, Mega Kangaskhan defines Doubles OU. Boasting a Normal typing and attacks strong enough to 2HKO majority of the metagame, Mega Kangaskhan is a dangerous threat to face, as there are few switch-ins to its attacks. Mega Kangaskhan's dominating power is partly thanks to its ability, Parental Bond, which effectively gives Mega Kangaskhan's attacks a 50% power boost and lets it hit twice, breaking and hitting through through Focus Sash and Substitute. Sporting access to a setup move in the form of Power-Up Punch, which, thanks to Parental Bond, is effectively a Swords Dance that deals damage, Mega Kangaskhan is a very dangerous threat, as it can also boost its already high power to astronomical levels; the ability to function both as a dangerous setup sweeper and as a powerful wallbreaker from the get-go defines Mega Kangaskhan's effectiveness and role. Mega Kangaskhan also has access to Fake Out and Sucker Punch; the former lets it buy a turn for a partner or get momentum while also hitting for decent damage, and the latter lets it circumvent its middling Speed and hit faster threats with priority. Sporting high power and the relatively rare Normal typing, which creates few, if any, synergy issues, Mega Kangaskhan makes for a solid strong attacker for any kind of team that has room for a Mega Evolution.

However, as Mega Kangaskhan's Speed is only above average, it's outsped and beaten by numerous faster threats, such as Mega Diancie, Mega Metagross, and Keldeo. Mega Kangaskhan's Normal typing also leaves it with few safe switch-in opportunities due to not having any resistances or immunities save for the Ghost-type. The immunity is not even that useful, as Mega Kangaskhan's standard sets lack a way to hit opposing Ghost-types, such as Aegislash and Mega Gengar, save for the unreliable Sucker Punch.