What beys are banned in metal fight tournaments?

It depends on the format. Why don't you read the rules and find out?
https://docs.google.com/document/d/18nVK...sp=sharing
https://docs.google.com/document/d/1OIFE...sp=sharing

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Hey, parents! Here are all the answers to any questions about WBO Tournaments you might have! Thread-Guide-Hey-Parents-Answers-to-your-WBO-Tournament-questions

Please consult this guide linked below on how to arrive at tournaments before they start! https://worldbeyblade.org/Thread-How-to-arrive-at-tournaments-and-other-events-on-time