Board Thread:General Discussion/@comment-32147440-20171202005054/@comment-5846800-20171231220400

I say Overflow(He's a different species from Water Hazard - Cascan), Shock Rock, and Gax(Though he mayed be named differently in the OC) exist in the Original Continuity. The only thing that could possibly prevent Overflow from being in the watch is that he is from the Andromeda Galaxy and the OC Omnitrix has aliens from only the Milky Way Galaxy, in other words Ben would have to scan a Cascan to get Overflow.

​And as for the Omni-Enchanced aliens, the only way for them to exist in the OC is if Ben uses one of his smart aliens or Upgrade to upgrade the Omnitrix.

​As for the reboot having all the OC aliens it is possible that the watch has them they're just locked, look at Rath for example.