Turn 1 Tier 2 Tracker by Pet
The idea behind this challenge is simple: level up on turn 1, buy the resultant tier 2 pet and take it all the way to 10 wins.

Quickly check which pets have completed turn 1 tier 2 runs in any of the packs. Check out the Challenge Videos section for the complete list including all the fails.
Select a pack to view the list of pets: 
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Turn 1 Tier 2 Status
Tier 2
Pack 4
Pack 3
Pack 2
Custom
Pack 2
Weekly
Pack 5
Pack 1
Weekly
Pack 3
Custom
Weekly
Pack 3
Custom
Weekly
Custom
Weekly
Custom
Pack 1
Pack 4
Custom
Pack 3
Weekly
Pack 1
Pack 3
Pack 2
Weekly
Pack 4
Weekly
Pack 5
Weekly
Pack 1
Weekly
Pack 1
Weekly
Pack 2
Weekly
Pack 3
Weekly
Custom
Pack 1
Pack 2
Custom
Pack 1
Pack 4
Custom
Weekly
Pack 1
Pack 2
Weekly
Pack 2
Custom
Pack 1
Pack 3
Note that many of these runs were completed on previous versions of the game!