Aliasing waldo -> wally.

Reason: US vs. international names. Where's_waldo should be aliased to where's wally for the same reason.

Did the Where's_ tags but Waldo itself is too simple/ambiguous to alias for 17 images.

Since waldo tag is yet to be used by other copyrights (If there is one, we could do waldo_(copyright)),
I think it's okay to alias waldo -> wally.

I'd still prefer not to. There aren't enough posts to warrant even potential ambiguity.