im looking for any metal fusion or 4d bey that can defeat the powerful hell kerbecs bd145 cs please help

We have tons of combinations that can do so with a high success rate, look around the customization forum or just look at the top-tier customizations thread, as those combinations will usually fare well against it.

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thanks

You shouldn't make threads for Questions, or else you can be warned.
Search Around and you'll find the answers you need, like Dan said.

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