Sorry the hack doesn't work on Dolphin for some reason, so I'll find a way to make this hack compatible.
Features:
1) Green Hill Zone's boundaries are extended.
2) The bridge is now a fall through area. (3rd Picture)
3) Rock has collision.
4) 1st Image shows the bottomless pit I made.

Glitches:
1) When your character is big enough, at the left and right side of Green Hill Zone, the camera ends up glitching. (Noticeable when you use Mushroom/Lightning Stacker Code.)

Issues:
1) It is also noticeable at the platform below the bridge, that when the players are far from each other, you see whats through that platform. This also applies when going to the left side of GHZ. (Platform on the 3rd image that Mario is standing on.)
2) You can see the Breakable platforms if you fall down where it fell.
3) Sometimes Items will spawn to the bottomless pit that I showed you. (1st Image)
4) Fixed camera mode does not have a changed position, for the extended boundaries.
5) When the Devil Assistant Trophy is summoned, players will die when your at the left and right sides of the screen.
6) The Ledges aren't very accurate.
7) Since the rock is close to the right side of the blast point, the cpus will get struggle trying to find a way out.
Fixes:
1) Fixed the problem where ledges are unable to grabbed at the left side of Green Hill Zone (1st Image) & the area below the bridge. (3rd Image)

2) Resolved the problem when your at the left and right ends of the bridge, where you used to glitched through the floor/wall. (3rd picture)

Note:
1) The Tails Icon displaying on the monitor is not included. (2nd picture.)
2) Lucario and Ice Climber's Final Smash Positions were changed.
3) If your game crashes then your other hacks will be the reason, or if you used the wrong module that isn't
a GreenHill Module.
4) Before you report, please tell me which launcher did you used for Brawl if your game freezes. Tested on Riivolution so it'll work. PAL version I'm not sure if this will work.
Originally Released: February 20th, 2014.
Following update was on March 18th, 2014.

It's Big Battlefield, a bigger version of Battlefield, unlike the one in Super Smash Bros. For Wii U, when the fighters are too far apart from the stage, it might look very pale. Also the Shadows in the stage might look incorrect for you. I would reccomend playing Multi-Man Brawl to have a better experience with it. By the way I made Battlefield 1.5 times bigger in scale. I'll fix other problems on 11/11/14.
Originally released on November 8th, 2014.
Next day update was on 11/9/14.

OUTDATED HACK, FIXED LINK. Originally released December 25th, 2014.
-Read the Ness.txt file if you don't want to read the whole info on the website.
-4th Image: http://i.imgur.com/YK8kIgU.jpg
-5th Image: http://i.imgur.com/NjP9FwJ.jpg
-6th Image: http://i.imgur.com/DqYvO7e.jpg
-PM me if your willing to make a preview for this, you need to PM me if you want the sfx but you have to make a preview for it along with this PSA.
-If you noticed that Ness sounds loud on Side Smash and Final Smash, its because I have SMASH 4 Ness voice clips but I need somebody to preview it, so PM me and make a preview for it and the PSA but make sure you don't upload the SFX I made to Brawl Vault though or else I will remove/discontinue this hack.
-Ness has some differences between Brawl and Smash 4 but I tried to use some things that Smash 4 changed for Ness:
-YOYO is Green
-Colors of PK Thunder and PSI Shield are different.
-PSI shield Size is larger and earlier to interupt
-PK thunder size is larger and faster opponents which doesn't dissapear for the 1st 10 frames when it touches something but solid collision. (Ness has hitbox for the 1st 10 frames when
the PK Thunder appears)
-Up and Down Smashes can be charged through C-Stick? and also faster. (Not the chargeup or startup, only the Smash attack hit.)
-YoYo hitboxes unchanged.
-Ness could also use YOYO at a cliff but it still has hitbox.
-He has better overall speed.
-PK FLASH Unchanged.
-PK FIRE has a bit more SDI
-PK THUNDER 2 goes faster but less base knockback and more knockback growth. (NOT LIKE SMASH 4)
-PK THUNDER 2 when it hits a wall you could interupt with your Up-Special. (only once while in the air but refreshes on ground)
-Air Dodge has landing lag. (Not Exactly like Smash 4)
-Damage Fly voice clips added.
-Changes in Knockback and Damage from attacks.
-Up Tilt and Down Air has a Flash effect which were also used in Ness' Dash attack and Forward air.

If you noticed in image 2, the grass right next to the loop is yellow, and the small waterfall is pink, also in some of image 1. This might work on Dolphin but most likely not. A glitch that I experienced is that the starpost you see in image 1 & 3 for some reason after its hit, the starpost reverts back to it's original color until it respawns. Before you report, make sure you tell me what type of launcher you used for your brawl. If your hack freezes on Riivolution then you hack another hack that is the conflict, since I tested it on Riivolution.
Original Release: March 23rd, 2014