Fusion

A technique that fuses 2 bodies into a a single body!this technique is comonly in dbz universe but in Sonic's universe it is used by the power of the super emeralds!

 CELL2 SAGA 

In the cell2 saga Goku and Sonic did fusion and became Sonku to defeat Cell2!Sonku's powers are chaos kamehameha,chaos bomb,spin dash,and chaos control!Sonku can also go ssj,ssj2,and ssj3!

 MECHA BUU/BABY SAGA 

In the mecha Buu/Baby saga,Sonic decides using fusion withShadow making Shadic and Goku suggest using fusion with Vegeta making Gogeta!when Buu absorbs mecha Sonic 2.0 and proves to be too much for Gogeta and Shadic,Supreme Kai sugests Shadic and Gogeta do fusion, thus making Gogedic!Gogetic's powers include chaos big bang kamehameha,chaos control,chaos sphere,and chaos big bang kamehameha X1000!!!Gogetic can go ssj,ssj3,ssj4,and the mysterious ssj5!