The Super Bunny is a weird glitch that lets you use your sword as a Pink Bunny.
It is only useful of course if you plan on not getting the Moon Pearl...
Although it gives you the ability to use your sword, you are still very helpless
as you can't use any of the other items. The Super Bunny reverts to a normal
bunny when hit.
Paragraph II.4.A : Lake Hylia
This method lets you become a Super Bunny in Lake Hylia (in the Dark World). It
seems to have many powerful side effects, including recovery of deleted
savegames and teleportation (some sort of exploration glitch but in the
outworld). Thanks to David Wonn and his glitch site for this one.
You'll need the flippers, the Magic Mirror, the ability to reach the Dark World
version of Lake Hylia and not having the Moon Pearl for this glitch.
Check David Wonn's site (I can't give the url because it changes all the time.
Just search for David Wonn in any good search engine).
I'll probably experiment this glitch a lot more before I write something of my
own because it seems very interesting but I have nearly not used it yet.
Why it happens:
The game gets confused during the incorrect warps between the two worlds. I
don't know much more about it for now, but it is very similar to all other
bunny-related glitches: the bunny state is a very particular state, but the
programmers never imagined that we could try and do interesting stuff in this
state so they didn't program any error catching system. This is why doing some
weird things like messing up with the deep water and the world warps has such
interesting and unexpected consequences.
Not much to say for the moment. I'll experiment it further and tell you what
there is to know.