Many codes
Here are some codes, most of which I'm positive will work.
Infinite Super Bombs - DE1C-81F9
Infinite Bottle Rockets _ D01D-85F9
Infinite Big Bottle Rockets - D017-8029
Infinite Brain Food Lunch - DE99-E1F5
Infinite Cup of Life Noodles _DE56-80F9
Infinite Kraken Soup - DE18-7920
Infinite Large Pizzas - DE93-8025
Infinite Magic Truffles - DE97-E095
Infinite Peanut Cheesebars- DE5A-E0B0
Infinite Bottles of DX Water - DE5B-59B9
Infinite Magic Puddings - DE58-5599
Infinite Bread Rolls - DE9A-E595
Infinite Cookies - DE96-59F5
Gives 60 HP a bread roll instead of 30 -DC92-E095
300HP for bread roll- 7F92-E095
Cookie gives 30 HP instead of 6 - D996-51F5
60HP a cookie -DC96-51F5
300 HP a cookie- 7F96-51F5
If you need more help, we've got more Earthbound cheats and also check out all of the answers for this game
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