Delibird was another tag along Pokemon from the end of Johto like Jigglypuff.
However once Johto ended Delibird went a long gap with no appearance, it wasn't in any Hoenn episode and then re-appeared in that BF episode with Butch/Cassidy. Delibird also re-appeared in the ep Jessie captures Yanma/Yanmega in DP.
Why do you think they brought back Delibird after a 160 episode gap yet didn't do the same for Jigglypuff? Jiggly is still well-known among the fanbase, its even still in Smash Bros, so I don't know why it never made any comebacks, yet Delibird managed to instead.
However once Johto ended Delibird went a long gap with no appearance, it wasn't in any Hoenn episode and then re-appeared in that BF episode with Butch/Cassidy. Delibird also re-appeared in the ep Jessie captures Yanma/Yanmega in DP.
Why do you think they brought back Delibird after a 160 episode gap yet didn't do the same for Jigglypuff? Jiggly is still well-known among the fanbase, its even still in Smash Bros, so I don't know why it never made any comebacks, yet Delibird managed to instead.