Board Thread:Questions and Answers/@comment-6527064-20141010110746/@comment-3096633-20141010191427

Zenoseiya wrote: I'm pretty sure Ben got the idea for the Biomnitrix from that time he glitched the Omnitrix while fighting Animo and that time he turned Psyphon and Rook into alien hybrids. Except this way he can control the results rather than receive random combinations.

It mustve taken Ben years of thought on how to create fusions with the omnitrix.