With the Jungle Adventure addition I was able to purchase the 1st Sugar Skull from a vendor. I was surprised to be able to do this, as I heard these skulls were from a limited timed event that is unk...
"kalaksed;c-17408961" wrote: you can, actually: edited to put everything in spoilers, since you said you wanted to find it for yourself. the first spoiler is a hint in the right direction, the second spoiler is a lot more detailed
here's the list of options you can get at a tombstone (or urn); https://i.gyazo.com/ed91788ba3f0c2ae88c217d385d91dae.png
you'll want to 'leave sugar skull offering', which is what my sim is doing here https://i.gyazo.com/b90e27f2f767cb55660d7f2e750a5cce.jpg (note the thought bubble over her head)
if that works (it doesn't always), there will be a flash of light over the tombstone and this notification in the corner: https://i.gyazo.com/843afd820c529036848a082eb2975010.png https://i.gyazo.com/fdfaba35e349e9d0108be894afcf1dd6.png there's also a very noticeable noise, as well
that will spawn a sim, occasionally newly generated, but usually an existing one, to be a 'day of the dead celebrator' dressed in one of the day of the dead outfits and usually with the facepaint. in my case, it randomly picked one of my high end celebrities, basically my game's diana ross: https://i.gyazo.com/ba63c2e0600e14f7275a2791552aeef0.png
the good news is, even if they're a celeb like cecelia here, you can still get the 'ask for sugar skull' option https://i.gyazo.com/15b0839fd215dda400fbd7913177123a.png
but you do still have to befriend them, which is more difficult with celebrities: https://i.gyazo.com/38239fdf58f15a33028666ca6eba25aa.png
my example sim here isn't the best at social interactions, so i'll leave it here... but, once you get a sim up to maybe 1/5 of the relationship bar to green, they should give you a sugar skull when asked. there's a cooldown before being able to summon another celebrator, so it takes a while to get the whole collection without cheating or downloading it from the gallery, but it is still doable also, it seems all the other tombstones and urns in my graveyard are from sims whose ghosts have been culled, so i can't check to see if the cooldown is on a per tombstone basis or not
Your version of Diana Ross but with a name closer to Cilla Black ?
(although unless you're a Brit of a certain age range, this will go well and truly over your head)