[OOC] Return to the Rusty Rat

[DM Surranó]

Simply put, assuming the animal type would imply, among others, that the druid's Int would drop to 2. And this is not RAI, nor is Animal Growth.
An interesting question, though, whether you can exploit Enlarge Person in that case, considering that a wild shaped humanoid druid is still a humanoid. ("unfortunately" (*evil dm cackle*) ruling out Toot who's a fey, but this also means not being subject to charm person, dominate person, etc.)

EDIT:
There seems to be a consensus in PF that polymorph-like effects (wild shape included) do not stack with any size changing magic. So effectively, you become immune to offensive size change attempts as well.
For 3.5, at least Enlarge Person states

Multiple magical effects that increase size do not stack, (...)

The wording seems to be quite proprietary, e.g. could a medium character turn into a medium badger (wild shape into small badger then enlarge person)? Or could reduce work the other direction, turning into a tiny badger, or even a diminutive cat (at level 11)?
There's some debate, though, whether transforming to a large animal counts as "increase size" at all. Some argue that you change from your normal self to a normal animal.
But taking this wording now I create precedence by stating that in this game

Multiple effects that alter your size in any manner don't stack, regardless how the size is altered.

This does not rule out a humanoid altering self to some medium creature then applying Enlarge Person.
This does not rule out illusions either, e.g. a three feet tall character may appear to be six feet tall, then enlarged-- still will appear as six feet tall and will actually be six feet tall.