Golbat's been a good Pokemon in general, even without Heracross. He's probably one of the best switch-ins to Venusaur (As long as you dodge Sleep Powder, I guess) resisting both Leaf Storm, Sludge Bomb and is immune to Earthquake. He can 2HKO 252/200 Milotic with Brave Bird, which is pretty epic. Having three 4x resists to some of the most used attacking types in the metagame and reasonable Pokemon makes Golbat a very good choice for any team. If he had base 110 Speed, I'd be all over him, but he doesn't, so I'm only just "liking" at the moment.