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/houndoom.asm

@@ -1,10 +1,10 @@
-; HoundoomPokedexEntry: ; 0x1d0f66
 	db "DARK@" ; species name
 	dw 407, 770 ; height, weight
 
 	db   "The pungent-"
 	next "smelling flame"
 	next "that shoots from"
+
 	page "its mouth results"
 	next "from toxins burn-"
 	next "ing in its body.@"