Turbo and Nitro both stood up as they were getting into their stances infront before they would take out both a Chaos Emerald and a Chaos Ring before they put them together as the ring and emerald glowed brightly before the their bodies did the same as they shouted"Chaos...Fusion!!!"right before they merged into a different figure

Excel (Turbo and Nitro's Fusion) smiles a little and stretches while appearing in his Super Form and powered up and took his stance"Hehe,Now this will be fun,Now let's see what you can do,Y/N,Give me your best shot!"

(I know that usually when it comes to fusions (at least in Dragon Ball) That the fusion's name is a mix of the two making the fusion but I could not come up with any good name combinations for them so I guess Excel will do)