Investigation unlocks 10 hidden monsters

Monster	Notes	Needs first	Week	Eco Rank	Free Hunt
Radiant Paolumu	150	5 on Pink Rathian		6	IV
Radiant Tzitzi-Ya-Ku	180	5 on Radiant Paolumu	13	7	IV
Radiant Odogaron	210	5 on Radiant Tzitzi-Ya-Ku	15	7	IV
Radiant Diablos	240	5 on Radiant Odogaron	18	8	V
Radiant Rathalos	270	5 on Radiant Diablos	20	8	V
Radiant Legiana	300		22	8	V
Radiant Radobaan	330	5 on Radiant Legiana	24	9	V
Radiant Pink Rathian	360	5 on Radiant Radobaan	27	9	V
Black Diablos	390	5 on Radiant Pink Rathian	30	9	VI
Radiant Black Diablos	420	5 on Black Diablos	36	9	VI