This asset does not function like the Wonder Flower from SMBW as is, however does include the Wonder Flower, Wonder Seed, Royal Seed and aura for each World. I am aware that the Special World does not have a Royal Seed, but I included one out of necessity. Please give credit if you use it and enjoy!
Showcase:
Please note that the showcase above is also using MrDoubleA's extendedBGOproperties which you can get here:
viewtopic.php?t=28888
I've included the settings I used in the gif here:
Flower:
rotation = sin(t*2)*10;
y = 0.125;
pivotX = 0.5
pivotY = 1
Aura:
rotation = t*85;
And also Retro Resolution by PlumberGraduate:
viewtopic.php?p=396294&hilit=resolution#p396294