Author's Note
The image was one I found on google now onto the nicknames also I think you can see a trend with these names!

Nicknames:
Grenade
Grenade boy
Grenade fist
Grenade puncher
Grenade gun
Grenade launcher
Grenade shooter
Angry grenade
Zapdos hero (because of the spiky things on his costume above his head like the Pokemon)
X hero (because of the thing on his chest on the costume)

Author's Note
Here's the Pokémon I'm talking about and it has two forms and I was thinking of the new form for the most part but the original form is the first photo and the new one is the second photo but I'm gonna go show my mom my edits right after this is posted!