Clean up comments

Base data: types uniquely lacked a comment; items on one line; distinguish unknowns
Dex entries: don't imply that pointers don't exist

data/pokemon/dex_entries/venusaur.asm

@@ -1,10 +1,10 @@
-; VenusaurPokedexEntry: ; 0x181773
 	db "SEED@" ; species name
 	dw 607, 2210 ; height, weight
 
 	db   "As it warms it-"
 	next "self and absorbs"
 	next "the sunlight, its"
+
 	page "flower petals"
 	next "release a pleasant"
 	next "fragrance.@"