Ulquiorra releases his sword in 269 and he goes into his resurrection in episode 270
Ulquiorra Schiffer is Espada # 4
if your talking about the impure world resurrection, the episode hasn't been made yet, its only happened in the manga
~Spoiler!~ Ichigo.
When Yammy isn't in his released form, Ulquiorra is stronger because he is the Cuarta Espada (the 4th Espada) and Yammy is the Decima Espada (the 10th Espada). But when Yammy is in his released form, he becomes the Ciero Espada (the Zero Espada) and that makes him stronger than Ulquiorra. - Sukineko
Season 8 | Episode 13: "Go Stewie Go"
Ulquiorra fades away in Episode '272. Ichigo vs. Ulquiorra, Conclusion!'
Episode 267
Episode 139
Episode 139
I'm not sure but i think it is in the 260 or something like that. you can try some epsode around 260. When Ulquiorra is fighting Ichigo, he releases in episode 271. Then he releases for a second time in episode 271. Ulquiorra is the only arrancar that has achieved a second release.
when he fights against Ulquiorra, the 4th espada
In episode 267,268,269,270,271. btw its ulquiorra
Episode 140: Ulquiorra's Scheme, the Moment when the Sun Sets!
269 ichigo and ulquiorra release there swords
The episode is called "Resurrection"
does it really matter? he is still alive so what importance does it have and around 5, 1- ulquiorra, 2- aizen, 3-ulquiorra again, 4-his hollow, 5-byakuya. this is of episode 308.
he fights him on episode 161 but fails and fights him again. i dont no when that is but most likely in the late 200 episodes