I know it may be a horrible idea, but the ultimate fusion system is when you take 4D system parts and interchange them with other ones or regular metal system ones. Always lock them together with facebolts. If I think up any more, I'll post them and how to make these Beys:
Crusher Susanow AD14ES
Take any kind Susanow ring and use the Big Bang metal frame upside down on the core, no PC frame. Mode Change enabled.
X-Fortress Ikarius GB145WD
Take a Susanow ring and put it on top of a Flame wheel. Then take the Big Bang metal frame and place it upside down under the Flame wheel, then place the PC frame of the Big Bang wheel like you normally would onto the Big Bang wheel, then add the spin track and performance tip. Mode change enabled.
If you want me to try to make Beys for this system, request them in the comments below.
Crusher Susanow AD14ES
Take any kind Susanow ring and use the Big Bang metal frame upside down on the core, no PC frame. Mode Change enabled.
X-Fortress Ikarius GB145WD
Take a Susanow ring and put it on top of a Flame wheel. Then take the Big Bang metal frame and place it upside down under the Flame wheel, then place the PC frame of the Big Bang wheel like you normally would onto the Big Bang wheel, then add the spin track and performance tip. Mode change enabled.
If you want me to try to make Beys for this system, request them in the comments below.