SMB NES Hacking help

[pgattic]

Hello evrybodee!
I am working on a SMB NES hack, and in it I want to make it so that, as small Mario, you can get a fire flower instead of mushroom, and you stay small with fire colors+powers (skipping the mushroom power). (I already know about the "stay small" Game Genie cheat code, but it isn't helpful because it still requires you to get a mushroom before advancing to fire power.) I've been looking around for a while, and can't seem to find any help. Thanks in advance to anyone who can help me!

[jeffxvx]

There's a very well-document disassembly of SMB1 by doppelganger which should guide you to the specific portions of codes that are relevant for you. If you have questions after reviewing the disassembly, feel free to message me. I've made a number of SMB1 hacks