Here is the full list of all 30 Easter Egg achievements.
Take an Easter Egg to the home
Pick an Power-Up Box
Pick an Boost
Consume a Freezer Power
Consume a Lightning Power
Consume a Anvil Power
Consume a Power Shield
Consume a Purify Power
Consume a Egg Bomb Power
Consume a Double Up Power
Complete the Training
Win a Match
Earn the MVP award
Reach Level 10
Reach Level 20
Reach Level 30
Reach Level 40
Reach Level 50
Reach Level 60
Reach Level 70
Reach Level 80
Reach Level 90
Reach Level 100
Reach Bronze Rank in any Game Mode
Reach Silver Rank in any Game Mode
Reach Gold Rank in any Game Mode
Reach Platinum Rank in any Game Mode
Reach Diamond Rank in any Game Mode
Reach Master Rank in any Game Mode
Reach Champion Rank in any Game Mode