Actually whimsicoot is faster then jumpluff at mementoing and sleeping but he's not immune to toxic spikes.
I've used gravity chansey on one of my stall teams and being able to poison the likes of giratina and lugia with toxic spikes was always fun. Also gengar is actually a usable spin blocker lol. Subbing up on forry and threatening him or all the spinners with focus miss or hp fire, and thunderbolt is always just hilarious. It even beats tentacruel with specs thunderbolt .