World Beyblade Organization by Fighting Spirits Inc.

Hi, I was wondering if this organization allows all the different kinds of beyblades like the plastic, hard metal system and the metal fusion?

Yes, on certain conditions. Read the rulebooks, the private message you got when you joined, and use the "Ask a question, get an answer!" topic for small questions like that, or even the "Questions about the WBO" thread since this relates to us more.

Official tournaments only contain B:MF/MFB battles, though many still collect plastics and HMS, and play with them for fun.

In the future, questions like this should be asked in the "Ask a Question, Get an answer!" thread.