How to Hack NES ROMs to Add Your Own Sprites

by Isaac Wellish

published June 24, 2019, last edited March 08, 2024

posted in Hacks Gaming LCDs & Displays/ Graphic TFTs

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Beginner

Project guide

Going Further

If you want to change more than just a single sprite you will have to do some more shuffling around in the CHR bank.

Find some screen shots of the creation of "Impossible BurgerTime" below.

Find a link to the Piskel sprites here!

"Impossible BurgerTime" Mods

Changing Chef to Cow

Front

hacks_Screen_Shot_2019-06-21_at_6.39.00_PM.png

hacks_Screen_Shot_2019-06-21_at_6.39.00_PM.png

hacks_Screen_Shot_2019-06-21_at_6.40.49_PM.png

hacks_Screen_Shot_2019-06-21_at_6.40.56_PM.png

Front idle
Walk down left
Walk down right

Back

hacks_Screen_Shot_2019-06-21_at_6.41.02_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.02_PM.png

hacks_Screen_Shot_2019-06-21_at_6.49.39_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.09_PM.png

Back idle
Walk up left
Walk up right

Side

hacks_Screen_Shot_2019-06-21_at_6.41.17_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.17_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.26_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.34_PM.png

Side walk

Attack (Throw Salt)

hacks_Screen_Shot_2019-06-21_at_6.41.54_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.54_PM.png

hacks_Screen_Shot_2019-06-21_at_6.41.40_PM.png

hacks_Screen_Shot_2019-06-21_at_6.42.01_PM.png

Front
Side
Back

("Dying" sprites not shown)

Ice Cream changed to Burger King Crown

hacks_Screen_Shot_2019-06-20_at_7.05.28_PM.png

A popular burger chain with a royal logo carries the Impossible Burger, so it's only natural that a crown gives our cow more salt throw at enemies!

Splash or Title Screen

hacks_Screen_Shot_2019-06-21_at_5.02.38_PM.png

Letters added / modified.
Impossible Flag added.
Cow added inside of "B".

Our new mods in action!

Can you change the enemies to something more creative? Enjoy and happy ROM hacking!

Page last edited March 08, 2024

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