Split items/ and trainers/ into their data/ and engine/ components

Move some data into a pokemon/ subdirectory

data/pokemon/base_stats/stantler.asm

@@ -0,0 +1,22 @@
+	db STANTLER ; 234
+
+	db  73,  95,  62,  85,  85,  65
+	;   hp  atk  def  spd  sat  sdf
+
+	db NORMAL, NORMAL
+	db 45 ; catch rate
+	db 165 ; base exp
+	db NO_ITEM ; item 1
+	db NO_ITEM ; item 2
+	db GENDER_F50 ; gender
+	db 100 ; unknown
+	db 20 ; step cycles to hatch
+	db 5 ; unknown
+	INCBIN "gfx/pics/stantler/front.dimensions"
+	db 0, 0, 0, 0 ; padding
+	db SLOW ; growth rate
+	dn FIELD, FIELD ; egg groups
+
+	; tmhm
+	tmhm HEADBUTT, CURSE, ROAR, TOXIC, PSYCH_UP, HIDDEN_POWER, SUNNY_DAY, SNORE, PROTECT, RAIN_DANCE, ENDURE, FRUSTRATION, EARTHQUAKE, RETURN, PSYCHIC, MUD_SLAP, DOUBLE_TEAM, SWAGGER, SLEEP_TALK, SWIFT, DREAM_EATER, DETECT, REST, ATTRACT, THIEF, NIGHTMARE, FLASH
+	; end