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WRAM clear oversight (Generation II)

The WRAM clear oversight occurs in Generation II, and is confirmed to apply to Pokémon Crystal. The internal function "ClearWRAM" does not function correctly, due to a bug in the code, only clearing bank 1 of WRAM.Pokémon Crystal disassembly A similar glitch occurs in Pokémon Red, Blue, and Yellow (see WRAM clear oversight (Generation I)).

Relevant section in the Pokémon Crystal disassembly indicating patch to add with +

ClearWRAM::
 ; Wipe swappable WRAM banks (1-7)
 ; Assumes CGB or AGB

 	ld a, 1
 .bank_loop
 	push af
 	ldh [rSVBK], a
 	xor a
 	ld hl, WRAM1_Begin
 	ld bc, WRAM1_End - WRAM1_Begin
 	call ByteFill
 	pop af
 	inc a
 	cp 8
-	jr nc, .bank_loop ; Should be jr c
+	jr c, .bank_loop
 	ret
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More research is needed for this article.


Reason given: Document more effects of it. Can a Glitch Pokémon evolve if its sprite and name are "stable" enough? Are there many glitch cries available for Glitch Pokémon? List Glitch Type Sprites that could cause interesting effects. Study the causes and effects of the corruption of the PC Pokémon Selection in Fr/Lg. Test again the effect of Pokédex entries of Glitch Pokémon.







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