How to make weapons similar to the way some of the OOA weapons are used?

[SkyanUltra]

I want to make some weapons using the interesting use styles of the Ghastly Glaive and Sleepy Octopod, but I haven’t found anything on it. Any help with this?

 

[Drachenkeks]

I think they have custom code and dont use the standart use styles, maybe look into the source code for that.