Create New Monitors (In Sonic 2)

Hello Everyone Shadow05 here and today I'm going to show you how to create new monitors (In Sonic 2).

Creating New Subtype(s)

GitHub

Adding Code

First Goto Obj2E_Types: and you will see this.

; ===========================================================================
Obj2E_Types:	offsetTable
		offsetTableEntry.w robotnik_monitor	; 0 - Static
		offsetTableEntry.w sonic_1up		; 1 - Sonic 1-up
		offsetTableEntry.w tails_1up		; 2 - Tails 1-up
		offsetTableEntry.w robotnik_monitor	; 3 - Robotnik
		offsetTableEntry.w super_ring		; 4 - Super Ring
		offsetTableEntry.w super_shoes		; 5 - Speed Shoes
		offsetTableEntry.w shield_monitor	; 6 - Shield
		offsetTableEntry.w invincible_monitor	; 7 - Invincibility
		offsetTableEntry.w teleport_monitor	; 8 - Teleport
		offsetTableEntry.w qmark_monitor	; 9 - Question mark

At the end add this.

		offsetTableEntry.w Invalid_monitor_1	; A - Invalid 1

Then after qmark_monitor add this.

; ===========================================================================
; ---------------------------------------------------------------------------
; 'Invalid' Monitor #1
; Insert Comment Here
; ---------------------------------------------------------------------------
Invalid_monitor_1:
	nop       ; Insert Code Here.

Beneath that is Ani_Obj26 before offsetTableEntry.w Ani_obj26_Broken add this.

		offsetTableEntry.w Ani_obj26_invalid1		; $A

Then this.

Ani_obj26_invalid1:
	dc.b   1,  0,  $B,  $B,  1,  $B,  $B,$FF

Now add a new sprite in SonMapED Along with some art but now you might notice the broken sprite is the new monitor!

Fixing Wrong Animations

To fix this Replace B in Mapping_frame with C, A in anim with B and B in Ani_obj26_Broken with C.

Finding Free Vram

So you've added art to your new monitor but it's overwriting the ring art!

To fix this you'll need to find free Vram with at least $41 bytes free so it doesn't over write the other art.

Xerowhirl

Coming Soon

New Monitors

This part of the guide contains my ideas so you don't need to add them.