Usopp is not a close range fighter and he knows that. Man is at his best when he’s capable of putting space between he and his opponents. He’s even better when he’s able to shot his opponents while keeping a distance. Whether is Karoo, Tama’s lion dog, chopper the hundreds of times, etc
While a beetle is probably the most common opinion on what type of pet if devil fruit weapon he should have I personally think some weird amphibian or reptile would be cooler. Maybe like a frog or chameleon so they can climb on walls and use camouflage and stuff. Tho they admittedly aren’t the fastest animals but still
Point is whether it’s a devil fruit or whatever I think he needs his own Zeus. Lowkey if for whatever reason he got Prometheus I wouldn’t mind
I do expect or at least want big mom to show up in elbaf and do her soul pocus thing against usopp in front of the giants