How to defeat Garuga. When on the Level 2 (99) bullets, you can find a ledge that you can climb to attack the Garuga. The Garuga will not come up to that place. Keep shooting it in the head and you will get 40,000 Z.
How to defeat Kut-Ku. You have to get a Bowgun and Level 2 (99) bullets. Keep shooting at its head until it falls. If you complete that challenge, you will get a lot of money.
You can unlock the following movies if you meet the following monsters:
Avian Master of Jungle: Yian Kut Ku in the "Great Jungle Kut Ku" quest
Blue Hunter: Velociprey in "Your First Monster Hunt" quest
Divine Providence: Rathalos in the "Rathalos Urgent" quest
Poison of the Swamp: Gypceros in the swamp
The Lone Black Wolf: Yian Garuga in the "Slay 20 Velociprey" quest
The Phantom Beast: Kirin
King of the Heavens: Rathalos in the "One Star Egg Carry" quest
Lao-Shan Lung: Lao Shan Lung
Menace in the Sand: Cephladrome in the "Land Shark" quest
Shepard: Velocidrome in the "The Formidable Velocidrome!" quest
Supreme Ruler Inferno: Gravios
The Ancient Piscine: Plesioth
To get Quick armor. Finish the first five Level 1 quests. Kill three Velocoprey to get hidden items, then, mine and do the quest and mine quest. Make Veloceprey armor from the ore and Veloceprey item.
To duplicate items, you have to play with two players and get all the items to trade. Now go to the online gathering hall. The following thing you have to do is to give all the items to the other player. Next, turn off the game (do not make a save) when the other player stays in the online gathering hall. Return to the game to have all the items you gave to the other player. If you get back all those items, and you will have your items doubled.
To get a pet pig, at the beginning of the game, search for a pig following a man around the village. Hit it and when the music stops, press X to get that pig.