Offline Color Variants
     There are 3 color variant wyverns you can unlock.

MonoDevil (White Monoblos):   Kill a Silver Crown Sized Monoblos

Rioheart (Pink Rathian):      Kill a Silver Crown Sized Rathian

RioSoul (Blue Rathalos):      Kill a Silver Crown Sized Rathalos



Trial mode
     To unlock Trial mode, you must complete the quest "Jungle Menace".

Basarios' Trials:        Complete "Basarios: Unseen Paril"

Cephadrome's Trials:     Complete "The Land Shark"

Gravios' Trials:         Complete "Terror of the Gravios!"

Gypceros' Trials:        Complete "Slay The Gypceros!"

Khezu's Trials:          Complete "The Shadow In The Cave"

Kut Ku's Trials:         Complete "Jungle Menace"

Monoblos' Trials:        Complete "Horn of the Monoblos"

Plesioth's Trials:       Complete "Water Wyvern in the Desert"

Rathalos' Trials:        Complete "Attack Of The Rathalos!"

Rathian's Trials:        Complete either "Queen Of The Desert" 
                         or "Slay The Rathian!"



Unlockable offline elder quests

Deliver a firestone:     Unlock and complete Gravimos, Diablos 
                         and Furufuru quests

Diablos:                 Buy a piece of Monoblos armor

Furufuru:                Buy a piece of Rangosta armor

Gravimos:                Buy a piece of Galeos armor

Lao Shan Long:           Complete all offline quests including 
                         the alternate colored monsters unlocked 
                         by defeating a silver sized monsters 
                         (Monoblos, Rioleus, Rioleia)

Pink Rioleia 
and Blue Rioleus pair:   Complete the firestone quest