wild jigglypuff know it, and you can teach it to almost all Pokemon
Chatot can learn sing. You can get one by trading a buizel with a boy in Eterna city.
Fuego Ironworks, Veilstone game corner (10,000C)
Catch a Pokemon with the move "sing", get a few ultra balks or a master ball and find milocti fight the Pokemon using sing then a low level Pokemon attack then throw the pokeball and repeat until caught.
It's not hypnosis, but it lulls Pokemon to sleep. It is, the move Sing. Jigglypuff knows it, and you can get it by ''accident'' by using Metronome.
you can't, because its not a TM but here is a list of all the Pokemon that can learn it by leveling up. http://www.serebii.net/attackdex-dp/sing.shtml
"Ding-Dong! The Witch Is Dead" :Ding Dong! The Witch is dead. Which old Witch? The Wicked Witch!Ding Dong! The Wicked Witch is dead.Wake up - sleepy head, rub your eyes, get out of bed.Wake up, the Wicked Witch is dead. She's gone where the goblins go,Below - below - below. Yo-ho, let's open up and sing and ring the bells out.Ding Dong' the merry-oh, sing it high, sing it low.Let them knowThe Wicked Witch is dead!
a chatot can learn sing
Country
Cleffa, Clefairy, Clefable Igglybuff, Jigglypuff, Wigglytuff Chansey, Blissey Lapras Smoochum Skitty, Delcatty Swablu, Altaria.
neil diamond
Alvin And The Chipmunks did not, in fact, originally sing Witch Doctor. David Seville made his own version, for them to sing, of the original, by The Cartoons.
it was 1970