Glalie

Glalie finds a niche for itself in Battle Spot Singles with two very important traits in its ability Moody and access to Sheer Cold, an OHKO move no type is immune to. Glalie is able to effectively take advantage of Moody to gain boosts to all of its stats, making it faster, bulkier, more evasive, and more powerful. Additionally, it can fall back on Sheer Cold to get rid of almost every single Pokemon in the metagame. While Glalie's stats may be mediocre, they are just high enough to get by; for example, it is just fast enough to set up Substitutes in front of Pokemon like Dragonite, Cresselia, Suicune, Rotom-W, and Venusaur, and it only needs a +1 boost to its Speed to outspeed the entire unboosted metagame bar Mega Alakazam and Mega Aerodactyl. This means that, with a bit of luck, Glalie can fish for Moody boosts against almost anything. Glalie is also fantastic against stall or defensively oriented teams. Since those teams are typically slower, Glalie does not have to rely on lucky boosts to its Speed and can immediately become a threat. However, Glalie's Ice typing leaves it with no useful resistances and with many weaknesses to common offensive types, such as Fighting, Fire, and Rock. This means that unless it is behind a Substitute, Glalie is quite vulnerable to being KOed. Most notably, Glalie is weak to several common priority moves such as Bullet Punch, Mach Punch, and Vacuum Wave, all of which have common users such as Scizor, Breloom, and Lucario. This means that even if Glalie has Speed boosts, it can easily be picked off by these moves. Moody can also be incredibly unreliable, as Speed and defensive drops can spell doom for Glalie, and it doesn't benefit at all from an Attack or accuracy boost. Sometimes, Glalie will lose simply because it just got the wrong boosts, and there's nothing you can do about that. However, if luck is on your side, Glalie can beat almost anything.