Azuril, Plusle and Minun
a chatot can learn sing
I don't think swellow is capable of such a move.
There is no TM for Sing, sing is only a leveling move (or egg move)
The move Sing cannot obtained as a TM or HM.
Fuego Ironworks, Veilstone game corner (10,000C)
sing that's it
Sing is not a TM (Technical Machine). It is a move that only certain Pokemon learn. You can only learn it by leveling up certain Pokemon (Skitty, for example, learns Sing by leveling up).
the move sing does. that's really the only move the puts enemy Pokemon to sleep. oh wait yawn also does.
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.
There's more put two are yawn and sing.
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.
Hypnosis is the best move to put Pokemon to sleep which is a ghost type move. Also Grass whistle which is obviously a grass type move and sing which is a normal type move. Hope this helps!