Capture the Tigerex by trapping it when it's weak and limping with a shock trap or when it's sleeping/resting. Then throw a couple of tranq bombs in the monsters face and if it's weak enough it'll go to sleep. Then use a Great Sword's charge attack on it's head to badly wound or kill it (have a Gunner or Sleep Knives ready).

If you need to collect crystals bring your kitten and gather at mountain area 4. The kitten will find the gathering spot for you (Giant Ice pillar).

When you have complete the indicated task the corresponding movie at the 'Gallery' menu will become an available option.

Unlock Akantor Ecology Movie:
Slay an Akantor.

Unlock Akantor Movie:
Encounter an Akantor.

Unlock Alternate Intro:
At the tower Kill Nana Teskatory.

Unlock Ancient (White) Fatalis Intro:
Encounter an Ancient Fatalis.

Unlock Babakonga Ecology Movie:
Slay a Babakonga.

Unlock Babakonga Intro:
Encounter a Babakonga.

Unlock Beach Intro:
Complete a quest at the Beach area.

Unlock Cephadrome Intro:
Encounter a Cephadrome.

Unlock Crimson Fatalis Intro:
Encounter a Crimson Fatalis.

Unlock Desert Intro:
Complete a quest at the Desert area.

Unlock Diablos Ecology Movie:
Slay a Diablos.

Unlock Diablos Intro:
Encounter a Diablos.

Unlock Dodobrango Intro:
Encounter a Dodobrango.

Unlock Dos Fango Intro:
Encounter a Dos fango.

Unlock Fatalis Intro:
Encounter Fatalis.

Unlock Forest and Hills Intro:
Complete a quest at the Forest and Hills area.

Unlock Game Credits:
At the tower kill Nana Teskatory.

Unlock Giadrome Intro:
Encounter a Giadrome.

Unlock Gizami Intro:
Encounter a Gizami.

Unlock Gravios Ecology Movie:
Slay a Gravios.

Unlock Gravios Intro:
Encounter a Gravios.

Unlock Gypceros Intro:
Encounter a Gypceros.

Unlock Hypnoc Ecology Movie:
Slay a Hypnoc.

Unlock Hypnoc Intro:
Encounter Hypnoc.

Unlock Khezu Ecology Movie:
Slay a Khezu.

Unlock Khezu Intro:
Encounter a Khezu.

Unlock Kirin Intro:
At the Mountain area encounter a Kirin.

Unlock Kusharudaora Ecology Movie:
At the Mountain area slay the Kusharudaora.

Unlock Kusharudaora Intro 1:
Complete the Purple Dress Lady urgent quest.

Unlock Kusharudaora Intro 2:
In the mountains encounter a Kusharudaora.

Unlock Lao Shan Lung Intro:
Do the Lao Shan Lung quest requested by the legendary blacksmith.

Unlock Monoblos Intro:
Encounter a Monoblos.

Unlock Mountains Intro:
Complete a quest at the Mountain area.

Unlock Nana Teskatory Intro 1:
Do the Nana Teskatory urgent quest.

Unlock Nana Teskatory Intro 2:
Do the Nana Teskatory quest at the tower.

Unlock Narugakaruga Ecology Movie:
Slay a Narugakaruga.

Unlock Narugakaruga Intro:
Encounter a Narugakaruga.

Unlock Oonazuchi Intro:
Encounter an Oonazuchi at the Forest and Hills Area.

Unlock Plesioth Ecology:
Slay a Plesioth.

Unlock Rahjan Intro:
Encounter a Rahjan in the Elder Dual Rahjan quest.

Unlock Rathalos Intro:
Encounter a Rathalos.

Unlock Rathian Ecology Movie:
Slay a Rathian.

Unlock Rathian Intro:
Encounter a Rathian.

Unlock Swamp Intro:
Complete a quest at the Swamp area.

Unlock Teo Teskatoru Intro:
Encounter a Teo teskatoru at the Volcano Area.

Unlock Tigrex Ecology Movie:
Slay a Tigrex.

Unlock Tower Intro:
At Area 1 complete a quest in the Tower area.

Unlock Ucamulbu Intro:
Encounter an Ucamulbu.

Unlock Velocidrome Intro:
Encounter a Velocidrome.

Unlock Volcano Intro:
Complete a quest at the Volcano area.

Unlock Volganos Ecology Movie:
Slay a Volganos.

Unlock Volganos Intro:
Encounter a Volganos.

Unlock Yamatukami Ecology Movie:
Slay Yamatukami.

Unlock Yamatukami Intro:
Encounter a Yamatukami.

Unlock Yian Garuga Intro:
Encounter a Garuga.

Unlock Yian Kut Ku Intro:
Encounter a Yian Kut Ku.

Unlock Zazami Ecology Movie:
In the Desert Crab urgent quest slay the Zazami.

Unlock Zazami Intro:
Encounter a Zazami.