Mareanie Hyper Offense in Tier Shift. Blacephalon is the main sweeper here. You need to have No Guard on Blacephalon, along with Merciless. One layer of Toxic Spikes is good, but if they run out, don't stress. The team still does well without Merciless abuse. https://pokepast.es/9cec222dfaf566f7
https://pokepast.es/b2352a251f12f921
https://pokepast.es/da380f5534044b1f
https://pokepast.es/1668905c814acdf2
https://pokepast.es/42dee3c3462cf33c
https://pokepast.es/0f2d691829ae1fde
https://pokepast.es/ae6151198e131ee8
https://pokepast.es/c01608c6f836015a