Mike Tyson's Punch-Out!!

Mike Tyson's Punch-Out!! is the NES port/semi-sequel of the arcade game Punch-Out!!. It contains a cameo from Mario, boxers that are obviously cheaters, and an out of place ad for the "Nintendo Fun Club" (now known as "Club Nintendo").

Unused Dodges
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Using the Game Genie code, you can see that Glass Joe, Great Tiger, and Mike Tyson have unused dodging animations. The code alters something so that the boxers either block or dodge your attacks. Glass Joe and Mike Tyson's dodges can be seen without further codes, but an opponent modifier is necessary to view Great Tiger's, as using this code, you will not be able to progress past any boxer due to their newly-gained incredible defenses.

Regional Differences
In the original Japanese release, which was a limited-run edition, the last boss was Super Macho Man. When the game was later reformatted as Mike Tyson's Punch-Out!!, it had various changes, such as an added dream match against Mike Tyson, and thus becoming the new iconic last boss.

Title Screen
The title screen had blue text that read MIKE TYSON'S added to it at the top.

Some Engrish was corrected in Mike Tyson's Punch-Out!!; TRAINNER was corrected to TRAINER, and the last sentence was cut in half.

More Engrish fixing. A dashed line had to be removed to fit Mike Tyson's name.

Passwords
In Mike Tyson's Punch-Out!! and ''Punch-Out!! Featuring Mr. Dream'', there is a password to view the credits (106 113 0120, then hold Select and press A + B). In the original Japanese release, this password was left unfinished. The original Japanese version contains all 6 secret passwords and has the routines to check it with the same button codes, but they are never called from the password check routine and there is no code to handle these after checking, as well as the credits display code. The credits text is present in the original Japanese ROM in the same place as in all subsequent version releases, but obviously rendered unused. The difference between the original Japanese release and the other versions' credit messages is in two names: U.Kaneoka and U.Kuriyama in the original Japanese version were changed to Y.Kaneoka and Y.Kuriyama in all the other versions.

Matches
The HUD and boxing rings in the original Punch-Out!! have a different color palette than the ones in Mike Tyson's Punch Out!!.

Piston Honda and King Hippo's skin color were changed from pinkish to yellow.

Post-Match
Even more Engrish fixing was done to the regular victory screen. The Japanese version of the game is quite confused on who it should be congratulating.

The newspaper at the end of the game was changed to tell the player how to fight Mike Tyson/Mr. Dream, added a password for the Super Macho Man match, had its Engrish fixed, and changed the exclamation mark to be more blocky.

You guessed it, more Engrish and second-person fixing.

And here, too.

Revisional Differences
When Nintendo's license to use Mike Tyson's name and likeness expired, a different version of the game was released, replacing Tyson with a generic character named Mr. Dream. While this version is pretty rare on cartridge compared to the Tyson version, the Animal Crossing and Virtual Console versions of Punch-Out !! use this version of the game.

The updated version removes MIKE TYSON'S from the title screen, as well as the "MIKE IS WAITING FOR YOUR CHALLENGE!!" screen. A second copyright year, dated 1990, was added.

In with the Dream, out with the Mike.

Mr. Dream
And here is Mr. Dream himself. He's basically just a palette and head swap of Mike Tyson.

The pre-fight stats were changed for Mr. Dream, making them less realistic and more mysterious.