As Kim says:
Kim|ComPet wrote:There will be other significant advantages to using pets with a higher rarity when an upcoming system is introduced later this year.
Maybe, again, I'm not entirely related
to the title of your thread, but maybe will be good to add right rarity of pets in your list:
Chapter II - Dragon Disaster - Jareth killed ~ 300 times - legendary beast encountered 4 times - yield 1 venomander
Chapter VII - Pets for freedom - various kills ~ 400 times - legendary beast encountered 1 time - yield 1 sapphire chirin
Chapter XI - Unicorn Island - various kills ~ 360 times - legendary beast encountered 1 times - yield 1 rainbow unicorn
Chapter II - Dragon Disaster - Venomander - Epic rarity instead of Legendary
Chapter VII - Pets for freedom - Sapphire Chirin - Epic
Chapter XI - Unicorn Island - Rainbow Unicorn - Mythical
Don't know what rarity are Chapter VI, VIII and IX (Magic Lycanda, Sapphire Atrox and Black Rooster).
And if Uncommon < Rare < Epic, where to place Legendary and Mythical in the row?
Maybe, as most dedicated to the game, you can add also info for the Limited pets - here or in new thread.
Limited Edition Pets
Theme / Pet name / Rarity / Class / Cost
/ Phoenix / / Attuned / 500 Diamonds
/ Trumpetta / Uncommon / Aggressive / 100K Gold
Halloween (2016) / Ghost / Aggressive /
Halloween (2016) / Furlock Pumpkin / /
Christmas (2016) / Sir Santa Unicorn / Rare / Defensive / 500 Diamonds
Christmas (2016) / Gingerbread Man / Rare / Balanced / 500 Diamonds
Christmas (2016) / Cooked Turkey / Epic / Aggressive / 750 Diamonds
By the way, I can't see the picture of "Furlock Pumpkin" in the Book of ComPet?