Fast Goomba - SMW Hacking Help - SMW Central

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Fast Goomba

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Gulaschko
Shelless Yellow Koopa

Shelless Yellow Koopa

I love Shells.

Posts: 56/105
Since: 2020-02-15 08:07:02 AM
Location: Germany

Last seen: 53 minutes and 9 seconds ago

Link
Posted on 2020-10-27 07:24:42 PM

Hey there,
is there somewhere a patch/ sprite/ code where I can customize the speed of the goomba of the original game?

Regards

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WUK
Flopping Cheep-Cheep

Flopping Cheep-Cheep

SMW Hacks Creator

Posts: 6/6
Since: 2020-09-11 11:13:33 PM
Location: Serbia
Pronouns: He/Him

Last seen: 1 month and 1 day ago

Link
Posted on 2020-11-06 12:46:15 AM | Last edited 2020-11-06 12:49:14 AM by WUK

I think you can only do that with some asm

But I don't know how to do asm.

EDIT: If you want it to go fast you have this sprite:https://www.smwcentral.net/?p=section&a=details&id=24079

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Thomas
SMW ASM Moderator

skeleton irl

Posts: 6025/6087
Since: 2009-08-21 02:18:52 PM
Pronouns: He/Him

Last seen: 2 days ago

Link
Posted on 2020-11-06 05:26:43 AM

The issue with Goombas is that their code is shared as part of a large routine that handles all of sprites 00 through 13 (i.e. Koopas, Goombas, Bomb-ombs, Buzzy Beetles, and Spinies), so there's no simple way to edit their speed without editing all of them. There's also no disassembly of just the Goomba right now so that's not an option either.

Now, one option is to set the Goomba to use the Blue/Yellow Koopas' X speed instead. You can do that via this patch:

Code

org $0188FF
	db $21		; don't touch this value

org $0188EE
	db $0C,$F4	; the two X speeds it'll use instead (right, left), if you want to mess with them
			; note that this will affect blue/yellow koopas as well!

Alternatively, is possible to add an exception for the Goomba's speed using a patch, it's just a little funky looking: Show/Hide

Code

org $018B1C
	JSL SpeedHijack
	BRA +
org $018B26 : +

freecode
SpeedHijack:
	LDA $9E,x
	CMP #$0F	; branch to modified code if a Goomba
	BEQ .goomba
	LDA.w $0188EC,y
	EOR $15B8,x
	LDA.w $0188EC,y
	RTL

  .goomba:
	PHB : PHK : PLB
	LDA.w .goombaXSpeeds,y
	EOR $15B8,x
	LDA.w .goombaXSpeeds,y
	PLB
	RTL

  .goombaXSpeeds:
	db $08,$F8	; rightwards speed, leftwards speed
	db $08,$F8	; these two are mostly just safety and should be identical to above

(sidenote: patch is untested)

Professional frame-by-frame time wizard. YouTube - Twitter - SMW Glitch List - SMW Randomizer

Gulaschko
Shelless Yellow Koopa

Shelless Yellow Koopa

I love Shells.

Posts: 63/105
Since: 2020-02-15 08:07:02 AM
Location: Germany

Last seen: 53 minutes and 9 seconds ago

Link
Posted on 2020-11-07 11:19:16 AM

thank you

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