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/larvitar.asm

@@ -1,10 +1,10 @@
-; LarvitarPokedexEntry: ; 0x1d169c
 	db "ROCK SKIN@" ; species name
 	dw 200, 1590 ; height, weight
 
 	db   "Born deep under-"
 	next "ground, this"
 	next "#MON becomes a"
+
 	page "pupa after eating"
 	next "enough dirt to"
 	next "make a mountain.@"