Place it at the close of an anime fan edit, once the main gag has landed. Open the sequence with the Mayuri Tuturu Sound Button as a greeting, bring this clip in next, and let the scene settle there without adding another effect afterwards.
About this sound
A six-and-a-half-second sung clip of Jigglypuff performing its signature song, delivered in a soft, high, cooing voice over a gentle tune. It feels sweet, sleepy and soothing, like a lullaby meant to drift listeners off. It comes from the Pokémon anime, where Jigglypuff's singing famously sends everyone around it to sleep.