The regular Synchro Chip was invented by Yuichiro Hikari to see if NetNavis and humans can become one, which was known as Cross Fusion, but it only works inside of a Dimensional Area. Also, at first, it was noted to be dangerous, as shown by Misaki failing to fuse with PrisMan.EXE and being electrocuted. However, a Navi and a human with a high Synchronism rating can perform it and become one, and the Navi-human hybrid will gain additional powers as well. However, when the Navi and the human is not in Synchro, such as arguing with each other, the Synchro will be broken. Also, people with the Crest of Duo can Cross Fuse thanks to the fact that it naturally increases the base Synchronism rate.