Inspired from the boom hammer weapon in Bloodborne, I think there should be an upgrade for the hammer where you can infuse it with energy. This would make it explode upon impact, causing an AOE or explosion around the player, knocking down the enemy robots. The more energy it is infused with, the bigger the boom. It could look the same as the Spidertron grenade effect. I think this would be a cool upgrade, and give a use for the energy capacity upgrade when doing hammer only runs, which I personally love doing!

O.O

Cool idea! But there is a REALLY good use for energy capacity in hammer runs, try a hammer and jetpack, it's OP, and I'm saying REALLY OP

This is a pretty cool idea!
I've been thinking of some sort of attack like that, "strike ground ---> AOE of some kind".

Could happen. We'll see! :)

I bet you can do this by Right-clicking with the hammer instead of left-clicking! But it will take two energy, and therefore require the first energy upgrade AND the hammer before it can be unlocked. The boom effect is similar to Spider-tron's bombs until you can find a better AOE attack mechanic. And you're immune from your own particles, much like Spider-tron is immune to its own bombs (but not someone else's!)

And, as an added difficulty to an already pretty dificult enemy, Mk.3 Hammer bots have this ability as well.