In game

As the Pet Glossary shows it. A pet you own also shows its tier (up to five ✦), its level and how charged it is.

As the game lists them. The same for all 39 pets.

Froglin

Uncommon pet5 steps

Gives youHeals 1% of your max HP a secondout of combat

Attack

Pet damage×120%

Arcane

Ocasionally spawns a healing orb That last for 4s | heals for 5% HP

While out of combat, heal +1% of your max HP per second.

Pet damage (“Bonus Damage” in game) is how hard Froglin hits. It does not raise your damage.

its attack, then 4 upgrades

Its attack
Shown above, with its pet damage.
Upgrade
Passive Heal +0.5%
AbilitySecond Croak!
Chance to ocasionally spawn a second healing orb.
Upgrade
Passive Heal +0.5%
Passive · what you getRibbit-O Tonic
Whenever your pet is Active Gain +2 HP per second
Passive Heal +0.5%

The glossary lists these 5 steps in this order. We don't have data yet on which tier unlocks each one.

We don't have data on where this pet comes from yet.

The Pet Glossary shows it as a Uncommon Pet Egg. Eggs hatch in an incubator.