A fish that Onion Cookie found swimming in her tears one day. It enjoys swimming in tears. And when it feels dehydrated, it'll start spraying Onion Juice to gather tears from anything that surrounds it (even obstacles)!
The Onion Fish "seems" to have one of the fastest charging abilities in the game for a S-grade pet, as it only needs 12 seconds to activate and lasts for 4 seconds - and its ability recharges while it's active, making it only need 8 seconds between activations.
It is one of the fastest pet releases in the game thus far, being released only 10 days after Panda Dumpling. It normally takes a couple of weeks to a month for a new pet release.
Onion Fish has been featured in the Package Deals for 38 days, which is the longest out of all pets featured.