Salamence isn't like Garchomp by any means in terms of being a powerhouse; however, its versatility can be compared with it. Choice Scarf Garchomp can easily be mistaken for Haban/Yache Garchomp; one player might switch in Skarmory on my Garchomp and take 60% from a +2 Fire Fang. All I have to do is ensure that at most of of my team can take 40% off of Skarmory which (imo) isn't hard to do. MixMence and DDMence boast amazing power. Not only can they 2HKO and OHKO a decent amount of the metagame, but a misprediction will cost you a chunk of your team. MixMence, dropping STAB Draco Meteors off of a 350 Special Attack stat, can dent just everything in OU while DDMence can force a switch and end up with +1 Attack and +1 Speed. Unfortunately, MixMence is difficult to switch in on since it requires luck, nothing more, nothing less.
The thing is that nothing can reliably switch into Salamence. If you switch in Skarmory, you'd have to assume that it's not a MixMence while with a Choice Scarf user, you'd have to worry about a potential Dragon Dance. You need to play more intelligently than your opponent, which is an unreliable move.Anyways, the #1 check to Salamence is SR and its own life orb recoil. Again you only need to make 1 smart switch to make salamence useless.
There's only one problem with Lapras being used as a check to Salamence: It isn't going to do anything else in OU with its horrid Ice/Water tying, terrible offensive capability and crappy movepool (yeah, for OU). What's more is that Lapras needs a significant amount of investment to secure the OHKO with Ice Shard after Stealth Rock damage. Theorymon is lol...Lapras is another decent counter to salamence, since it can iceshard for the KO and comfortably survives draco meteor, and doesn't care about dragon dance.










