Come now, you knew good and well there would be a reference to the big bad wolf at some point. This is me after all. Anywho, through hard work, or rather with a crest,(which I'm going to give it its own crest of determination), Gubbiomon will digivolve into GrandGubbiomon, it finally stands up right, some how gets fatter, and gets a fancy new wardrobe. Like before, the Gubbiomon remains, but this would be in reference to the wolf living a more lavish lifestyle amongst the citizens of Gubbio as well as big bad wolf, because me.

Type: Data
Species: Animal digimon (werewolf)
Level: Ultimate
Atk1. Button bullets
Atk2. Spectacle lasers
Atk3. Belly bomb

Alright, so let's go with it's attacks. Starting at the bottom, we have Belly bomb, in which GrandGubbiomon will keep in the air and do a belly flop with quite the destructive radius.

Spectacle lasers let's it use the sun or rather any light to fire a high concentrated beam through its double glasses.

And finally, there it's main attack, Button bullet, to which it eats something and on or all of the buttons flight off at mach 50 surrounded by the same energy it used in it's previous form, and because this is anime based, the dress/shirt it's wearing will always have a button appear mysteriously on it.