Obstagoon

Obstagoon's unique Normal / Dark typing makes it immune to Ghost- and Psychic-type attacks, giving it a unique niche as the only fully evolved Pokemon immune to Calyrex-S's STAB moves. Its decent Attack stat and Guts + STAB-boosted Facade give it a powerful offensive presence; coverage moves such as Knock Off, Switcheroo, and Ice Punch enable it to further threaten metagame staples such as Yveltal, Necrozma-DM, and Lunala. Obstagoon is severely limited by its susceptibility to chip damage from burn and entry hazards. In addition, its lack of useful resistances beyond its niche and a middling Speed means it will be is easily OHKOed or 2HKOed by most threats in the tier. Thus, it faces competition with most physical attackers in the tier, such as Marshadow, Zekrom, and Rayquaza, which will find more opportunities to switch in and threaten the opposing team. Obstagoon also cannot function as a team's sole Ghost-type answer and as such constricts teambuilding.