Battle:

Beat Bailiff 15 times in one-player battle arena.

Beat Candy Floss 105 times in the Battle Arena.

Beat Caveman 11 times in the Battle Arena.

Battle City Accountant 17 times.

Battle City Banker 19 times.

Battle City Hobo once and view Battle Opponents page.

Battle City Mayor 21 times.

Battle City Realtor 22 times.

Win a battle against Commander Zerk.

Win 380 battles against Cowboy then view Cowboy on the Opponents page.

Beat Cracked 1000 times in the Battle Arena.

Beat Crinkal in the Battle Arena 75 times.

Beat Daemon 23 times in the Battle Arena.

Battle Drab Army 26 times.

Beat Elger 210 times in the Battle Arena.

Beat Evil Tree 35 times in the battle arena.

Beat Explosive 27 times in the battle arena

Beat Flamed 276 times in the one-player battle arena.

Beat Flitter 28 times in the one-player battle arena.

Beat Frostbite once in the one-player battle arena.

Beat Fungus 30 times in the one-player battle arena.

Beat Gargoyle 9 times in the one-player battle arena.

Beat Goblar 35 times in the one-player battle arena.

Beat Gross 2 times in the one-player battle arena.

Beat Hades 29 times in the one-player battle arena.

Beat Hero 110 times in the one-player battle arena.

Beat Hot Dog 375 times in the one-player battle arena.

Beat Ice Gnome 50 times in the one-player battle arena.

Beat Devil once in the one-player battle arena.

Beat Inflate 30 times in the one-player battle arena.

Beat Insomniac 32 times in the one-player battle arena.

Beat Karate once in the one-player battle arena.

Beat Kevadra 100 times in the one-player battle arena.

Beat Kleptome 360 times in the one-player battle arena.

Beat Krick 50 times in the one-player battle arena.

Beat Lightning 32 times in the one-player battle arena.

Beat Little Invader once in the one-player battle arena.

Beat Lotus 15 times in the one-player battle arena.

Beat Lxi 10 times in the one-player battle arena.

Beat Magic 5 times in the one-player battle arena.

Beat Meager 33 time

Aged Minipets

Fandor - Attach a Fandor to your pet for 900+ days then view the minipet
Gingerbread - Attach a Gingerbread to your pet for 120+ days then view the minipet.
Lucent - Attach a Lucent to your pet for 260+ days then view the minipet.
Nerd - Attach a Nerd to your pet for 450+ days then view the minipet.
Peiko - Attach a Peiko to your pet for 500+ days then view the minipet.
Pinkal - Attach a Pinkal to your pet for 270+ days then view the minipet
Pixel - Attach a Pixel to your pet for 560+ days then view mini pet.
Psyclone - Attach a Psyclone to a Funky pet for 30+ days then view the minipet.
Pumkin - Attach a Pumkin to your pet for 980+ days then view the minipet.
Reon - Attach a Reon to a Stoneage pet for 50+ days then view the mini pet
Schmog - Unattach a Schmog from your pet after 81+ days.
Snowman - Attach a Snowman to your pet for 130+ days then view the minipet.
Tinsel - Attach a Tinsel to a Christmas pet for 10+ days then view the minpiet.
Yule - Attach a Yule to your Seasonal pet for 99+ days then view the minipet.

Attached and view:

Chibi - Dress your character in a Chibs Onesie or Chibs Mask and attach a Chibi minipet to your pet.
Super Hero - Attach a Superhero to a Superhero pet then view the minipet.


Plate:

Chest

Find a Concerto minipet when opening a Musical Treasure Chest.
Find a Kitsune when opening an Imperial Treasure Chest.
Get a Mina minipet when opening a Pisces Treasure Chest
Open a Vintage Treasure Chest.
Get a Scarabi when opening a Desert treasure chest
Find Scratchy Minipet inside a Safari Treasure Chest.
Get a Seaso minipet when opening an Underwater Treasure Chest.
Open a Wizard Treasure Chest.
Get a Starbert minipet in a Galactic Treasure Chest.


Jobs:

Fireman - Have a pet with Fireman job accept a promotion Level 8. (Fibula)
Mechanic - Have a pet with Mechanic job accept a promotion Level 10. (Capli)
Programmer - Have a pet with Programmer job accept a promotion Level 13. (Zumy)
Teacher - Have a pet with Teacher job accept a promotion Level 16. (Unhinged)
Spy - Have a pet with Spy job accept a promotion Level 15. (Cloeli)
Veterinarian - Have a pet with Veterinarian job accept a promotion Level 17. (Zaire)