Here is the full list of all 29 Vegetaball achievements.
Win 1 Game in Any Mode
Win 10 Games in Any Mode
Score your first goal
Score ten goals
Score fifty goals
Score one hundred goals
Score five hundred goals
Score the winning goal in overtime
Win your first Team game
Win your first Duel game
Join a party or have at least one player join yours
Play 20 with the Carrot
Play 20 games with the Pea
Play 20 games with the Tomato
Play 20 games with the Cucumber
Play 20 games with the Potato
Play 20 games with the Jalapeno
Play 20 games with the Onion
Play 20 games with the Broccoli
Play 20 games with the Pepper
Play 20 games with the Asparagus
Play 20 games as the Eggplant
Score twenty five goals
Win on court Standard
Win on court Da Warehouse
Win on court H Tube
Win on court Nubs
Win on Standard Duel court
Win on court Platform Party