A term used in Pokémon Sun & Moon when a Zubat calls for help, in turn summoning another Zubat with full health. After killing the first Zubat and lowering the health of the next Zubat, it proceeds to call for help, summoning yet another Zubat. This process can continue for over 10 minutes.
Person 1 (to Person 2): Hey Michael's been fighting those Zubats for quite some time now..
Person 2 (to Person 1): Yeah, it seems he's trapped in Zubat Purgatory at the moment..