move pokemon graphics to mon-specific directories

graphics/pokemon/sandslash/normal.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+213 213 180
+255 255 255
+246 238 90
+222 197 32
+189 164 0
+131 98 0
+238 238 222
+205 205 189
+139 139 139
+74 74 74
+205 180 74
+156 123 16
+123 90 0
+90 49 0
+16 16 16
+255 0 255

graphics/pokemon/sandslash/shiny.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+213 213 180
+246 238 156
+222 205 115
+164 148 65
+131 115 32
+98 82 0
+238 238 222
+205 205 189
+139 139 139
+74 74 74
+246 98 98
+213 65 65
+180 32 32
+123 0 0
+90 0 0
+255 0 255