For Shroomsy, mine's Toad's Factory.
For the Fire flower of death, mine's Coconut Mall.
For the star of awesomeness, it's Maple Treeway. Woot!
For the Crown of stupidity (that's why it's called Special, right?) it's Bowser's Castle.
For the STUPID Koopa shell (The red ones are the smart shells =P) it's SNES Ghost Valley 2.
For the slippery yellow thing it's GCN Waluigi Stadium.
For the leaf that oddly gives you the ability of a flippin' Tanooki, GCN Mario Circuit.
And last, but not least, the thing that zaps people harshly. That's SNES Mario Circuit 3.
^_^