I think you need these to upgrade it

What for? I just need the excelsior model.

Idk, power?

It's at max capacity. Adding more juice won't make it better. It'll tear itself apart.

Then use the emeralds for extra fire power

That's just seven shots. I'd rather have metal gear ray.

No you use the emeralds for upgrading the weapons

...I still don't want the smoke. I've already got a human slap-chop after me, don't need a damn hedgehog too.

Besides, the red dude would come after me, and I don't need that smoke.