{{incomplete|Document effects of other indices, in particular for Red/Blue if possible}}
The '''FacingDex''' covers [[glitch 0xC109 ID]]s in {{RBY}}., Thisand addresstheir controlsPokémon aYellow state[[ItemDex/Y:110|Lg- of(0x6E)]] theor player'slocked spritevalues (on exit mat) effects.
In Pokémon Yellow, by adjusting the value of C109 and using [[glitch item]] [[ItemDex/Y:110|Lg- (0x6E)]], it is possible to cause different effects, including [[arbitrary code execution]].
The C109 script also executes when walking around one tile above an exit with the value kept while walking.
In order to obtain an invalid C109 address, the player may encounter [[MissingNo.|Yellow regular MissingNo.]] to obtain a value which varies heavily.
==In Pokemon Red/Blue==
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