Proto:The Bugs Bunny Birthday Blowout

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This page details one or more prototype versions of The Bugs Bunny Birthday Blowout.

The prototype of The Bugs Bunny Birthday Blowout, then known as The Bugs Bunny Birthday Bash, is a pretty early build. Layouts for the first four worlds have been worked on, though it isn't possible to complete any of the stages at this point.

Unfortunately, the only available release of this prototype is a bad dump, though efforts have been made to repair the ROM.

To do:
Original and fixed ROMs.



Stage 1
The most complete stage, but that's not saying much.
Stage 2
The obligatory desert stage.
Stage 3
The volcanic stage. Watch out for lava!

NOTE: Stage 4 is badly corrupted, so it can't be compared to the final's Stage 4 easily.

Gameplay Differences

  • There is no title screen, although the graphics are present. The game throws the player to Level 1-1 immediately.
  • All objects, including Bugs, move at about half the speed they do in the final. This also means that the floating platforms have their ranges halved, making some sections impossible to cross.
  • There are no giant carrot objects present, meaning levels cannot be completed. The code for the object is present and partially functional: touching it will cause Bugs to float off the screen in a balloon as in the final version, but the level still doesn't end, and the music loops indefinitely.
  • There is no lives system in the prototype, so it's not possible to get a Game Over.
  • The only icons that work at this point are the carrots. Bugs cannot interact with any other icon.
  • Bugs does not dive in and out of tunnels in the prototype. The tunnels behave much more like the pipes in Super Mario Bros.
  • There are three debugging functions available: hold Start when starting the game to get a stage select menu, or hold A to go to a preliminary version of the Mole Game. You can also moonjump by pressing Select.
  • The Mole Game is more of a graphical demo than an actual game at this point. The moles cannot be hit, and as such the game will continue indefinitely.

Graphical Differences


For graphics that appear in multiple levels.

Prototype Final
Spin me around Where'd it go?

The disappearing platform in the final was a more complicated spinning platform at this point. The design was simplified to make room for Bugs' diving animation, but while the platform "disappears" it still spins.

So if you were ever wondering why those platforms had weird you know.

Prototype Final
Needs improvement Better

The graphics of Bugs and the balloon's basket were improved for the final.

Prototype Final
What? The universal symbol for health

The heart in the prototype was originally a bunny head next to some odd-looking waves, and was thankfully changed to something more understandable. Since Bugs can't interact with this in the prototype, it's not known if it would have served the exact same function.

Prototype Final
Who's got the bomb?More bombs than Don Bluth in the 90s Alarm clocks have been known to explodeIt's Explode o'clock

This bomb enemy was changed to an alarm clock. Same function, though, and the clock makes more sense thematically.

Prototype Final
Elmer Fudd is after dolphins now Nets work better in cartoons than reality

Elmer's nets were given more detail in the final.

Title Screen

While there is no title screen in the prototype, the graphics are present.

Prototype Final
Happy Early Birthday Bugs Now it looks empty

Applying these graphics to the final gives the image on the left. The chains are larger in the prototype, the letters of the title have some shading that was removed in the final, and there are little squares around the border.

Mole Game

Prototype Final
Isn't it cute? Remember him? Of course you don't

The mole game has actual moles in the prototype. The graphics were altered into Willy the Weasel.

Prototype Final
Puffy clouds Woo

This change altered the title graphics as well, replacing the unique graphics of the prototype with a rather plain-looking text box in the final.

Level 4

Prototype Final
Through thin And thick

The pipes in this stage are thinner in the prototype.

Level 5

Prototype Final
Awfully plain I guess you could say it was trunkated. If you were a jerk

The titleset for Level 5 has no powerup icons at this point. The inclusion of those icons meant that some graphics had to be removed, so the second tile for the tree trunks in the prototype was overwritten in the final. The trunk was also given some additional shading.

Prototype Final
Neat Pink?!

Another victim of tile overwriting: the unique spike graphics were changed to the simpler 8×16 spike tiles used in other levels.

Level 6

Prototype Final
It sure is a vase Exciting stuff

The lip of the vase was changed slightly in the final.

Prototype Final
Your beach ball deflated "But that's not a football!", you say

The (American) football was redrawn to look more like a...well, football.


Again, there's no ending in the prototype, but the graphics are there.

Prototype Final
Downs Syndrome Bugs? He's reading the ending dialogue

Bugs' eyes were redrawn to remove the cross-eyed look of the prototype.

Prototype Final
I surrender! Trying to kill Bugs does not count as a "funny trick", guys

And again.

Prototype Final
That bright shade of blue didn't help either No rabbit ears, guys

Roadrunner and Pussyfoot were removed from the photo in the final, probably because they don't actually show up anywhere in the game. Taz's oddly proportioned stomach was fixed in the final.

Unused Graphics

Graphics that are mostly absent from the final.

Mole Game

It's okay

Various tiles from the Mole Game. Some of these are still present in the final, while others were overwritten. The "SORRY" message doesn't appear in the final.

Speedy Gonzales

Pulled over by the P.C. police

Yep, it's him. His sprite only appears in the prototype, though there doesn't seem to be an object associated with these graphics.

Spiked Ball

You know, like in the movies

Just a simple spiked ball.



These odd tiles take up a character bank in the prototype. It's unknown what they would have been used for, or if they were even intended for this game. These were replaced with the Game Over and copyright tiles in the final.

Audio Differences


There's an extra piece of music in the prototype which is used while Bugs walks into frame.


The death jingle is 20% faster in the final.


The World 3 song has a 2.5-second intro which was removed from the final track.


The bonus stage song is about five seconds longer than the final, and has a different ending.



Bugs' hammer sound in the final has a Square2 component, which is not the case in the prototype.