Here is the full list of all 12 Punch A Bunch achievements.
Complete basic training.
Win the Amateur Series championship.
Win the Intermediate Series championship.
Win the Pro Series championship.
Unlock every single star.
Unlock every single star in the Amateur Series.
Unlock every single star in the Intermediate Series.
Unlock every single star in the Pro Series.
Reveal the final boss in the Pro Series championship.
Lose against any opponent.
Read every single page of The Boxer's Field Manual.
Equip an item in every single equipment slot.