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/bulbasaur.asm

@@ -1,10 +1,10 @@
-; BulbasaurPokedexEntry: ; 0x181695
 	db "SEED@" ; species name
 	dw 204, 150 ; height, weight
 
 	db   "While it is young,"
 	next "it uses the"
 	next "nutrients that are"
+
 	page "stored in the"
 	next "seeds on its back"
 	next "in order to grow.@"