My friend needs serious help. His deck sucks. He took this deck to a tournament and lost to a five year old.
Heres the deck:

Normal Monsters: 1
1x Dark Blade

Effect Monsters: 20
3x Gearfried the Iron Knight
1x Obnoxious Celtic Guardian
2x Command Knight
1x Gearfried the Swordmaster
2x Marauding Captain
2x Goblin Attack Force
1x Gilford the Legend
1x Ninja Grandmaster Sasuke
1x Hayabusa Knight
1x Swift Gaia the Fierce Knight
1x D.D. Warrior Lady
1x Exarion Universe
1x Mystic Swordsman LV2
1x Mystic Swordsman LV4
1x Exiled Force

Spell Cards: 14
1x Mystical Space Typhoon
1x Heavy Storm
1x Swords of Revealing Light
1x Fusion Sword Murasame Blade
1x Release Restraint
1x The Warrior Returning Alive
1x Mage Power
1x Snatch Steal
2x Nobleman of Crossout
2x Fissure
2x Reinforcement of the Army

Trap Cards:
1x Covering Fire
1x Call of the Haunted
1x Sakuretsu Armor
1x Dust Tornado
1x Hallowed Life Barrier


This deck is terrible. Please help.

To tell u the the truth I don't Know where to begin. It looks like it just came straight out of a structure deck and then he added a few cards and messed it up.

go on? What should he do?

All you did was buy the warrior structure deck and added some rubbish in there. Start yugioh by playing it on a program called YVD, its a great start.