Zero damage text

In RBY, there are extremely minor situations where zero damage can be dealt. These usually involve quad resists and profound level differences.

To quote the disassembly:
; this only occurs if a move that would do 2 or 3 damage is 0.25x effective against the target
However, Psywave is also capable of this.

Thus, a new case has been added for when this occurs, which is triggered through a new WRAM entry. Easiest way to do it without having to restructure how misses are handled.

This is overall minor, but it'll probably make at least one person laugh, and that's all I need.

engine/battle/core.asm

@@ -3949,6 +3949,17 @@ PrintMoveFailureText:
 	and $7f
 	jr z, .gotTextToPrint
 	ld hl, AttackMissedText
+	
+	; New text for when moves deal zero damage.
+	; This gives players a nice little dopamine rush.
+	ld a, [wDidZeroDamage] ; Grab the variable.
+	cp 1 ; Alright, is it set?
+	jr nz, .skip ; No? Skip these instructions.
+	ld hl, ZeroDamageText ; Load the zero damage text in.
+	ld a, 0 ; Now shut the address off.
+	ld [wDidZeroDamage], a ; Bink!
+	
+.skip
 	ld a, [wCriticalHitOrOHKO]
 	cp $ff
 	jr nz, .gotTextToPrint
@@ -3998,6 +4009,12 @@ AttackMissedText:
 	text_far _AttackMissedText
 	text_end
 
+ZeroDamageText:
+	text "It didn't leave"
+	line "a scratch!"
+	prompt
+	text_end
+
 KeptGoingAndCrashedText:
 	text_far _KeptGoingAndCrashedText
 	text_end
@@ -5403,6 +5420,7 @@ AdjustDamageForMoveType:
 ; this only occurs if a move that would do 2 or 3 damage is 0.25x effective against the target
 	inc a
 	ld [wMoveMissed], a
+	ld [wDidZeroDamage], a
 .skipTypeImmunity
 	pop bc
 	pop hl