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/blastoise.asm

@@ -1,10 +1,10 @@
-; BlastoisePokedexEntry: ; 0x1819f9
 	db "SHELLFISH@" ; species name
 	dw 503, 1890 ; height, weight
 
 	db   "It firmly plants"
 	next "its feet on the"
 	next "ground before"
+
 	page "shooting water"
 	next "from the jets on"
 	next "its back.@"