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To unlock the second item requires you to perform your best in ALL the matches so you earn an S-rank. To do this you will need to base your fighting style with the following bonuses in mind.
Your technique is rated by:
Vitality Bonus:
How much damage you have left.
Attack Rate:
How frequent you are attacking.
Dash Attacks
How many times you perform Dash Attacks.
Perfect Guards:
How many times you perform Perfect Guards.
Sidekick:
How many times you call on your sidekick.
Combo
What your highest combo is.
Guard Break:
How many times you perform a Guard Break on your opponent.
Stun:
How many times you stun your opponent.
Wall Rush:
How many times you perform Wall Rushes. Plus Ultras (100 points per Plus Ultra)
You get bonus points for the following:
Scoring a Perfect
Ultra Finish
First Attack
Didn't Guard
Ringout
Each chapter has 3 items that can be unlocked. The first item is unlocked by simply completing the challenge. The second item will also be unlocked if you perform well enough to earn an S Rank. The third item has Secret Objectives that must be accomplished. They are listed below in order:
No. 0: N/A
No. 1: Win by KO.
No. 2: Ultra Finish.
No. 3: N/A
No. 4: Win by KO.
No. 5: Ultra Finish.
No. 6: Win by KO.
No. 7: Win after using a sidekick attack 3+ times.
No. 8: Ultra Finish.
No. 9: N/A
No. 10: N/A
No. 11: Ultra Finish.
No. 12: Win with more than 80 percent HP.
No. 13: N/A
No. 14: Win with Quick Special 1.
No. 15: Win by time out.
No. 16: Win after using a sidekick attack 3+ times.
No. 17: Win after using a sidekick attack 3+ times.
No. 18: N/A
No. 19: Win with more than 50 percent HP.
No. 20: Ultra Finish.
No. 21: N/A
No. 22: Win with a Quick Special.
No. 23: Ultra Finish.
No. 24: Win in 30 seconds.
No. 25: Win by time out.
No. 26: Win with a Quick Special.
No. 27: Win by KO.
No. 28: N/A
No. 29: Win by time out.
No. 30: Win with a perfect victory.
No. 31: Win by KO.
No. 32: Win with a perfect victory.
No. 33: Win in 30 seconds.
No. 34: Win in 30 seconds.
No. 35: Win with Quick Special 1.
No. 36: N/A
No. 37: Win with more than 70 percent HP.
No. 38: Win by time out.
No. 39: N/A
No. 40: Win in 30 seconds.
No. 41: Win by time out.
No. 42: Ultra Finish.
No. 43: N/A
No. 44: Win in 30 seconds.
No. 45: N/A
No. 46: Win with more than 70 percent HP.
No. 47: Win with a Quick Special.
No. 48: Win without guarding.
No. 49: Win after guarding 3+ times.
No. 50: Ultra Finish.
No. 51: Win with more than 70 percent HP.
No. 52: Win by KO.
No. 53: N/A
No. 54: Win with more than 70 percent HP.
No. 55: Win in 30 seconds.
No. 56: Win after guarding 3+ times.
No. 57: Ultra Finish.
No. 58: N/A
No. 59: Win without guarding.
No. 60: N/A
No. 61: Ultra Finish.
No. 62: Win with Quick Special 1.
No. 63: N/A
No. 64: Win with a perfect victory.
No. 65: Win without using a sidekick attack.
No. 66: Win by time out.
No. 67: N/A
No. 68: N/A
No. 69: With with more than 70 percent HP.
No. 70: Win by time out.
No. 71: N/A
No. 72: Win with Quick Special 1.
No. 73: Ultra Finish.
No. 74: N/A
No. 75: N/A
No. 76: Win by ring out.
No. 77: Win by KO.
No. 78: Ultra Finish.
No. 79: Win with Quick Special 1.
No. 80: Win after freezing your opponent more than once.
No. 81: Win with a Quick Special.
No. 82: Ultra Finish.
No. 83: Win with more than 80 percent HP.