Originally posted by Mattrizzle

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1. Yes. Here's the relevant code (assuming you're hacking the US version of SMB2):

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1F392: LDA $8F //[A5 8F] load character value into accumulator (Possible values: #$00: Mario, #$01: Princess, #$02: Toad, #$03: Luigi)

1F394: CMP #$01 //[C9 01] compare it to value #$01 (Princess)

1F396: BEQ #$0C //[F0 0C] branch to 1F3A4 if there's a match, skipping the code that makes the playable character bob up and down while walking

//...Bobbing code follows...

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There are multiple ways you could alter the code to make the Princess walk like the other characters. Here are two:

One way is to change the character value in the compare statement at 1F395 from 01 to something meaningless, like FF. No character uses this value, so none of them will skip the bobbing code.

Alternatively, you could change the value at address 1F397 in the ROM from 0C to 00. This changes the branch length to 0, meaning the bobbing code will always execute.

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