QC Reject 1/3
Purugly has an incredibly difficult time setting up thanks to its atrocious bulk as well as its inability to threaten Pokemon out. If it does not set up, it will fail to do sufficient damage to pretty much everything. You can set up using Hypnosis, but Hypnosis is very unreliable; 60% accuracy means you will be failing 40% of the time. That is not nearly reliable enough to warrant use. Even with a Hone Claws boost, Hypnosis is still not very accurate.
Even once it sets up, Purugly will still be pathetically weak.
Another thing to note is that this set is completely walled by Rock, Steel, and Ghost-types. These are extremely common components of NU teams, and there will almost always be one or more of them.