Salamence

Salamence has quite a lot going for it in VGC. For one, its ability, Intimidate, weakens physical attackers on the switch-in. On top of that, Salamence also has decent bulk and combined with its Dragon typing giving it resistances to many common types, it will survive for a relatively long time for an attacker. Salamence has a respectable Special Attack and the movepool to back it up. Salamence's base Speed is 100, which lets it Speed tie or outspeed many Pokemon in the format.

Salamence has a 4x weakness to Ice-type moves, though, which makes it easily OHKOed. Many of the Pokemon which outspeed Salamence, be this through Choice Scarf or higher base Speed, can OHKO it with their STAB moves. Although Salamence's movepool gives it all it needs, Salamence is quite predictable due to it not being too expansive; this is only worsened by Salamence's reliance of low accuracy moves.