Here is the full list of all 15 HoloBall trophies - there are 11 bronze and 4 silver.
Get 10 aces in one match
Score 5 aces in a single round.
Score 15 points on Endurance
Get over 6000 pts on Hard
Defeat the AI on Hard difficulty
Get over 7000 pts on Medium
Defeat the AI on Medium difficulty
Get over 8000 pts on Easy
Defeat the AI on Easy difficulty
Beat any mode without the AI scoring
Get 10 rim shots in one match
Defeat the AI on Expert difficulty
Score 100 hits on Zen Mode
Beat Medium mode without the AI scoring
Beat Hard mode without the AI scoring