>>17212556Most formes of Rotom are actually pretty mediocre, but the washing machine and oven are really strong, especially in the current meta.
The washing machine, for instance, is only weak to grass because of levitate and its low weight makes grass knot (one of the grass moves with the widest availability) practically useless. It also has great attacking STABs in electric and water and can cripple physical switch-ins with will-o-wisp, despite not being ghost-typed. Also gets momentum with volt switch and uses it really well.
I haven't used the oven much personally, but I think it's getting a lot of play because of its fairy resistance. Also levitate turning its 4x ground weakness into an immunity is neat.
All the formes have pretty good stats and sport a ton of bulk. They can also run a variety of sets from chesto-rest to trick to pain split to a more offensive set. That said, the other ones aren't really worth using 'cause of their weak typings. The fan's ability is totally wasted since it's flying type, too.