Here's what I found so far:

Adventure & Space mode
0030:

00 - Human Shape
50 - Fighter Shape
52 - Fighter Shape in TGL mode

Max Consecutive Firing:
0039-01-01

Gun Power
003A:

03 - 3 Way Shot
02 - 2 Way Shot
01 - 2 Way Shot
00 - 1 Way Shot

Max Weapon Power:
003D:

01 - Blue
02 - Green
03 - Red

Max Shots:
003E-01-FF

Max Energy:
0048-01-FF
0049

Max Attack
004A-01-04

Max Shields:
004B-01-08

Area
0050:

00 - Area 0
01 - Area 1
02 - Area 2
03 - Area 3
04 - Area 4
05 - Area 5
06 - Area 6
07 - Area 7
08 - Area 8
09 - Area 9
0A - Area 10

Corridor:
0051:

00 - Corridor 0
01 - Corridor 1
02 - Corridor 2
03 - Corridor 3
04 - Corridor 4
05 - Corridor 5
06 - Corridor 6
07 - Corridor 7
08 - Corridor 8
09 - Corridor 9
0A - Corridor 10
0B - Corridor 11
0C - Corridor 12
0D - Corridor 13
0E - Corridor 14
0F - Corridor 15
10 - Corridor 16
11 - Corridor 17
12 - Corridor 18
13 - Corridor 19
14 - Corridor 20
15 - Corridor 21
16 - Corridor 22

Glitch Corridors:
17 - Corridor 23
18 - Corridor 24
1B - Corridor 27
1C - Corridor 28

X - Coordinates Modifer
0052

Y - Coordinates Modifer
0053

Boss and Item display
0070:

02 - Boss
03 - Item

Have All Weapons:
04AC-01-FF
04AD-01-FF
04AE-01-FF
04AF-01-FF

Have All Keys:
04B0-01-FF

Enemy hit points
0500 - 05C0

1ECCB - A9 01 Once you enter the dungeon, it will be completed.


Walking mode:

This code will let you go to the next room and enter a room in any spot.
$00A0:

01 - Go to the next room
03 - Enter a room: Need a better name.

This code here seems like a drawing of a map in an area that you're in.
$0740 - $07FF

Music Stuff:

$0300 - $03FF

Password Mode:

$0400 - $0430

Note: I notice that some of this stuff is not found by me and there's is a guide for this that someone made.

RAM Area $0400-$0460 Note: turn this off in fighter shape mode and password mode.

00 - Blank: this will let you walk over anything
02 - enter rooms
04 - Box
07 - Brown Pyramid
0A - Blue Pyramid
0E - Green Pyramid
11 - Blue Chip

Go to $041B and type in 02 and freeze it, $0439 and type in 20 and freeze it, $043E and $0453 and type in 02 and freeze it. It works on VirtuaNES too.

This code is very useful for the glitch passwords like this one:

GGGG GGGG GGGG GGGG
HHHH HHHH HHHH HHHH

JJJJ JJJJ JJJJ JJJJ
ZZZZ ZZZZ ZZZZ ZZZZ

5555 5555 5555 5555
0000 0000 0000 0000

6666 6666 6666 6666
hhhh hhhh hhhh hhhh.

$00A4-01-04 - you have to be in a message room, save room or a chip shop room to make this work. Look in RAM area $0051 to see what corridor you about to go in.