To use the new costumes hold down either the black or white buttons while selecting a stage in master tournament. Press the Black button for the Evil Ryu outfit and white for DOA Ninja Outfit.
Scarab List
5: Wooden Sword
10: Armlet of Fortune.
15: Vigoorian Flails
20: Armlet of the Moon
25: Dihalbro
30: Armlet of the Sun
35: Armlet of Benediction
40: Jewel of the Demon Seal
45: Armlet of Tranquility
50: Dark Dragon Blade