Ohka Pups

The Ohka Pup joins you from a young age in a white or black variant and will grow in power and size as you earn Experience while you have it equipped. The Ohka Pup has simple attacks but is quick to act and is more intelligent than most standard Mercenaries. It will start out very weak, but will grow powerful over time.

The pup specializes in taking down bosses at later levels, boasting the highest TransDefense of any Mercenary in the game - however it is easily overwhelmed due to its lack of speed.

To retrieve the Ohka Pup, play a special map [Lv20] Hound Rescue at the bottom of the Sector map list - which can only be played when you don't have a pup.
You must defeat the pup variant you'd like, either the stray black pup or the stray white pup.
You can only ever have one Ohka Pup at one time.

The Ohka Pup grows to be very powerful once it reaches its max level of 10.
If you sell your Ohka Pup, you may play the [Lv20] Hound Rescue map again to find a new one. This can be done in case you want to re-level your pup or swap its breed.

Pupgrade

Your pup will gain passive exp while you play games, you do not have to deploy the Ohka Pup in order to gain exp.
You will get a notification in chat when your Ohka Pup is ready to be levelled up.
To level up your Ohka Pup you must unequip it -> right click -> select "use", this will give a prompt asking if you want to level up your Ohka Pup at the cost of 5,000 Gigas.
Every level up costs 5,000 gigas.
To check how much exp your Ohka Pup has you must unequip it -> right click -> select "use", this will then show you how much exp your Ohka Pup has and how much is needed for the next level.

Pup Experience Table