Arc the Lad: Twilight of the Spirits

Start game as Kharg:
Complete the game and you'll unlock the option New Game+. This options lets you begin the game as Kharg with the following items in his possession: King Statuette, 3 Diamond coatings, 999 Spririt Stones, 10 Bountiful Fruit, 50 Dilzweld Bombs, and 100,000 Gold.

Unlock Choco:
Beat the 30-round arena trial in Rueloon with Darc's party.

Unlock Diekbeck:
Beat the 20-round arena trial in Cathena with Kharg's party.