How would you go about writing Button Mash as the main bad guy of a story?
Perhaps "The Stache" could bring Equestria to its knees and give him free vider games.

Or he could have a serious tantrum, get tempted by some evil lord dude, and get the power to raise his own army of video game NPC characters until he learns the magic of Fwendship and stuff.

Mabye he could become a vampire? Witch would make his train set bursting into flames make some sort of sence but not quite enough (Vampire Train system?? ) As well as give him an excuse to play games all night.

Or he could be a ponyfied version of a game character. Perhaps Bowser Jr.
Bowser Jr. has nothing on Button Mash.

Fell free to post yer ideas bellow

1513057 He gets tricked by Discord or possed by the Alicorn Amulet. Or like Spike he gets jealous when he thinks he's not loved.

The Stache foalnapping random ponies to stick in a survival games for the amusement of us.

The Stache gaining power and banning any form of entertainment that doesn't involve video games.

The Stache gaining the top rank in every MMO and the story is about his reign of OP-ness.

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The Stache forms

'The league of Stache wearing Super Villainous Ponies'

And goes to on to hire Spike, Pinkie, Snips and Snails.

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Perhaps "The Stache" could bring Equestria to its knees and give him free vider games.

I got the feeling he was more of the Anti-Hero type with a dark past and living only to bring justice upon the wicked.

Maybe have act like a villain to impress a girl he has a crush on.

He'd be like Raimundo from Xiaolin Showdown - He'd sell himself to the dark side for unlimited video games and milkshakes, and and early release of Half-Life 3.

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Early release of half life 3?! It looks like some pony wants an early Apocalypse.