Replace flawed Metal Powder bugfix (#890)

docs/bugs_and_glitches.md

@@ -182,23 +182,33 @@ Fixes in the [multi-player battle engine](#multi-player-battle-engine) category
 
 ([Video](https://www.youtube.com/watch?v=rGqu3d3pdok&t=450))
 
-**Fix:** Edit `DittoMetalPowder` in [engine/battle/effect_commands.asm](https://github.com/pret/pokecrystal/blob/master/engine/battle/effect_commands.asm):
+**Fix:** Edit [engine/battle/effect_commands.asm](https://github.com/pret/pokecrystal/blob/master/engine/battle/effect_commands.asm):
 
 ```diff
- 	ld a, c
+ DittoMetalPowder:
- 	srl a
+ 	...
- 	add c
- 	ld c, a
- 	ret nc
 
- 	srl b
+-	ld a, c
- 	ld a, b
+-	srl a
- 	and a
+-	add c
- 	jr nz, .done
+-	ld c, a
- 	inc b
+-	ret nc
- .done
+-
- 	scf
+-	srl b
- 	rr c
+-	ld a, b
+-	and a
+-	jr nz, .done
+-	inc b
+-.done
+-	scf
+-	rr c
++	ld h, b
++	ld l, c
++	srl b
++	rr c
++	add hl, bc
++	ld b, h
++	ld c, l
 +
 +	ld a, HIGH(MAX_STAT_VALUE)
 +	cp b
@@ -213,6 +223,46 @@ Fixes in the [multi-player battle engine](#multi-player-battle-engine) category
  	ret
 ```
 
+```diff
+ PlayerAttackDamage:
+ 	...
+
+ .done
++	push hl
++	call DittoMetalPowder
++	pop hl
+
+ 	call TruncateHL_BC
+
+ 	ld a, [wBattleMonLevel]
+ 	ld e, a
+-	call DittoMetalPowder
+
+ 	ld a, 1
+ 	and a
+ 	ret
+```
+
+```diff
+ EnemyAttackDamage:
+ 	...
+
+ .done
++	push hl
++	call DittoMetalPowder
++	pop hl
+
+ 	call TruncateHL_BC
+
+ 	ld a, [wBattleMonLevel]
+ 	ld e, a
+-	call DittoMetalPowder
+
+ 	ld a, 1
+ 	and a
+ 	ret
+```
+
 
 ### Reflect and Light Screen can make (Special) Defense wrap around above 1024