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/arbok.asm

@@ -1,10 +1,10 @@
-; ArbokPokedexEntry: ; 0x18203d
 	db "COBRA@" ; species name
 	dw 1106, 1430 ; height, weight
 
 	db   "To intimidate"
 	next "foes, it spreads"
 	next "its chest wide and"
+
 	page "makes eerie sounds"
 	next "by expelling air"
 	next "from its mouth.@"