Digitech Whammy IV.
I wanted a bass Whammy, but couldn't find one anywhere, new or secondhand. So I bought this, tried it and OMG!!!
So it may be lacking some features the bass Whammy has, and there is a slight volume drop but I love it so much. It has so many functions, and when you run a BBM through it it's incredible.
I recently discovered that by setting it to +2 Octaves, and having some fuzz run through, you can make some interesting sounds which remind me of an old SNES game!
Definantly my favourite and most fun pedal. Plus it just looks awesome.