Well, if there's anybody who still cares, the thunder Lakitu was (I think) reference to Raiden, a Japanese god of thunder a lightning. The thing on his back is an arc of drums.
I also noticed another interesting thing about Yoshi's Island (well, interesting to me anyway,) that I can't think of how to bake into a question. It has to do with how large blocks of level data (like rectangles of coins, etc.) are stored and created. I think it works like SMW (which would make sense,) in that the data for it is stored in a single corner, along with the X/Y dimensions...
ANYWAY: If you go to a level with a block of coins (2-1's good for this,) get a few coins from some columns, leave the screen, and come back, those entire columns will be missing, leaving those you left untouched... untouched.
I guess I just noticed it from a design standpoint, as I'm trying to recreate the game's engine in MMF. Eh, whatever...
Go Moon!