Now, let me get this straight before anyone starts saying that he wont be in Brawl, I KNOW that the chances of him making an appearance are slim to none, but I was just wondering what it would be like if he were in Brawl...
Perhaps something like this...
Basic Special Move: Weapon drop
Master Chief calls for assistance from the skies, and summons a random weapon from the Halo series to be used as a regular item. Beware though, the item will not always land near you, and it could result in an enemy using it against you, Master Chief is however, able to carry two of these weapons, having one in use and one on his back, he can also dual-wield certain weapons. All weapons have ammunition restrictions, before they are rendered useless, except for throwing at an opponent. Weapons are not always at hand for the UNSC, so it takes time to perform this move successfully. If Master Chief uses this when he has two weapons, he will automatically switch to his secondary weapon, making it the active weapon.
Up Special Move: Grav Lift
When faced with a tight situation, Master Chief can drop a Grav lift to send him skyward. If a grav lift successfully lands on a solid surface, it can be used by anyone to propell themselves upward.
Down Special Move: Bubble Shield
Master Chief throws a Bubble Shield to the ground, protecting him from any projectile weaponry, however, this Shield is not only usable by him, but can be used by any other player, friend or foe, and remains on where it was placed for a set time limit, or until it is destroyed. Only one Bubble Shield can be placed on the battlefield at one time.
Side Special Move: Grenades
Master Chief never has a lack of grenades at hand, and commonly uses them to flank an enemy. A random grenade from Frag, Plasma, Spike, and very rarely, Firebomb is thrown with these features:
-Frag Grenade
-Rarity: Common
-Explosion: Medium
-Stick: No
-Fuse: Short
-Plasma Grenade
-Rarity: Common
-Explosion: Medium
-Stick: Yes
-Fuse: Long
-Spike Grenade
-Rarity: Uncommon
-Explosion: Small
-Stick: Yes
-Fuse: Short
-Firebomb
-Rarity: Rare
-Explosion: Large, flame-enducing
-Stick: No
-Fuse: Impact
Final Smash: UNSC
For his final smash, Master Chief calls upon the UNSC for emergency backup, which in turn summons a random selection of both Marines and Elites to annihilate any force that dares to oppose them. Sometimes, the UNSC will feel the threat so great to send the Arbiter to assist him instead of the usual force. The Arbiter is far more powerful than the regular footsoldiers and lasts longer, but does not have the sheer volume of the regular forces.
Again, this is NOT a true profile, merely what I fell he would be like in Brawl if he were to appear in it which he HAS NOT AS OF YET, and the chances of him actually appearing are MINIMAL.
EDIT: Also, I'd like to say that I'm not one of those people who invades a forum and tried to convince a load of Nintendo fans to all go Xbox, to be honest, I love both systems (probably Ninty more, however) and seeing as we've already seen Snake and Sonic in Brawl, I was just wondering what it'd be like to have ol' Chiefy boy in it.