Jumpluff

Jumpluff is a niche Pokemon in the PU tier due to its ability to provide utility support for its teammates. Swords Dance and Strength Sap can turn Jumpluff into an unexpected offensive threat, bolstered by its nice Speed tier. Jumpluff has several other great utility moves, and options such as Sleep Powder, Memento, and U-turn allow it to support its teammates fairly effectively. Jumpluff also sports a decent typing that gives it an immunity to Toxic Spikes and Spikes and resistances to Water, Fighting, and Grass, though a weakness to Stealth Rock can hamper Jumpluff's longevity. However, Jumpluff's typing also gives it other exploitable weaknesses, including a nasty 4x weakness to Ice and 2x weaknesses to Fire and Flying. On top of this, Jumpluff is quite frail and can't do much outside of its support role. Jumpluff also can't afford to hold an item such as Leftovers because it needs a boosted Acrobatics due to its abysmal Attack, which remains underwhelming even with a Swords Dance boost. Lastly, despite Jumpluff's good Speed stat, it's in a crowded Speed tier and contends with other base 110 Speed Pokemon such as Alolan Raichu and Dodrio.