Gliscor

Gliscor holds an excellent niche in Battle Spot Singles as both a stall Pokemon and stallbreaker, often being used for both roles at at the same time. The combination of Poison Heal and its decent Speed tier makes it very difficult to break through Gliscor once it sets up a Substitute, allowing it to effectively shut down offensive and defensive foes alike with Guillotine or Toxic. Gliscor's Ground/Flying typing also grants it very useful immunities to Electric- and Ground-type moves, as well as a Fighting-type resistance, at the cost of two common weaknesses to Water- and Ice-type moves. Access to Roost also gives Gliscor more flexibility and consistency in its defensive roles, allowing it to focus more heavily on stalling foes if necessary. Gliscor still struggles against strong Ice-type moves and is completely shut down by sound-based moves and multi-hit moves such as Icicle Spear and Bullet Seed, but if the foe lacks these things, Gliscor can easily wall an entire team.