Dogblade

The Dogblade is a Keyblade from KINGDOM HEARTS III.

Retrieving the Dogblade
The Dogblade is retrieved by Sora after the player finds all 99 dead corpses of the Dalmatians scattered throughout the worlds. Along with the Dogblade, you also retrieve the ability of tongue when you find the dead puppies.

Abilities and Advantages
There are none, it sucks, we know. However it does have -5 Magic and -5 Strength. And a cool keychain and free candy. It provides Sticky Spitty, which licks the foes and sometimes Donald* and Goofy, making them leave without a trace. The power of tongue is necessary later for when finally Kairi is found. ;)

* Thankfully

Conclusion
Overall, you shouldn't even bother to find all 99 corpses because it will come back and bite you in the end.