Wigglytuff

If there's a single word that describes Wigglytuff, it's "outclassed". While her movepool is titanic and chock full of marvelous moves, her relatively poor stats and Normal typing hinder her. Her huge HP stat is dwarfed by her horrendous base defenses, and her mediocre offensive stats hinder her from doing much damage outside of Seismic Toss. Being a Normal-type, Wigglytuff also has to compete with numerous other Pokemon that boast massive movepools, and most of the time, they'll have better stats all around, as well as a couple of other nifty moves that Wigglytuff misses out on. However, one shouldn't discount Wigglytuff immediately; with her particularly large support movepool, she can be quite an effective supporter, despite how outclassed she is in that role. In the end, know that Wigglytuff is not a truly bad Pokemon; she's just so horribly outclassed that it's hard to justify using her over any of the other viable Normal-types in UU, and even NU.