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/tentacool.asm

@@ -1,10 +1,10 @@
-; TentacoolPokedexEntry: ; 0x1b82d1
 	db "JELLYFISH@" ; species name
 	dw 211, 1000 ; height, weight
 
 	db   "As it floats along"
 	next "on the waves, it"
 	next "uses its toxic"
+
 	page "feelers to stab"
 	next "anything it"
 	next "touches.@"