What should he use? (I’ve made many responses)

... El beat me to the shovel knight joke

A gun. For extra funny give him a Hyper realistic one XD

“A gun... wow. Lameass alert. What's the fun in using a weapon when it just kills the person you're fighting instantly? Haven't you wondered why nobody ever uses guns these days? Swords are so much cooler!“

(Meanwhile Theo beating someone to death with a combination of magic and his bare hands)

A sword that is actually a mostly useless prop that is a distraction for his real weapon which is a glock

Shovel Knight ahh OC

He’s just “knight”

Now give em a shovel

A shovel
It would be a knight with a shovel
Like an uh like a shovel knight

Shovl

“A shovel... what you want me to be some kind of Shovel Knight? That's... kinda cool actually….. but I don't think I would do well unless I had a friend with a cool shield...”

How about anime sword AND gun

Use the gun as a sort of parrying weapon.

“Anime sword? You think I have the strength to hold one? I may be strong, but I'm not that strong... I suppose you want me to wear a chainmail bikini too?”

No chainmail bikini. Just your normal armor.

F**k it. Use a Sabre and flintlock.

“A what?”

I've seen Knights and Paladin's with Axes, it's a pretty nice weapon

“An axe? I'm no bard! I can't kill someone by shredding with an axe! The bulge of death would appear before my eyes in an instant!”