Localizations (the best and worst)

[Dolphman]

That ugly American art was done by the late Greg Martin who was famous for his game and VHS cover art. But he does have bad ones as well.
For one thing he's notable for is the infamous "Assface & Mohawk" Sonic that plagued most of the American and some PAL version covers.
Sega openly hated this design, and requested him to make Sonic more on-model. But still allowed AOSTH Robotnik for some reason.

One example of horrible localisation is how all the classic Contra games became Probotector for PAL regions. Blame Germany for this one.
Everything that looked human was turned into robots. There's no fun in that! Even Hard Corpse wasn't safe, making the wolf guy a robot too.
This sucked when it came to the Virtual Console rereleases as they were still Probotector. Pal VC was garbage I can tell you that.
After the release of the Wii-U, we finally have them in their original Contra glory, thanks to them finally having some dignity.

Here's another fun fact: The Probotector himself ended up as an unlockable character in Contra 4 for the original DS.