|First appearance||Worlds of Tomorrow|
Hypnowaves are produced by the buzzing noise of the Hypnotoad, opening a gateway to a perpendicular universe.
In 3017, the Hypnotoad hypnotized Professor Hubert J. Farnsworth, making him order the Planet Express crew to take him to Amphibios 9. Once there, the Hypnotoad commenced his buzzing noise, making hypnowaves that revealed the female hypnotoad from a perpendicular universe.
The universe was pulled into the hypnowaves, but Lord Nibbler saved Philip J. Fry from being sucked in as well. Fry worked with Nibbler, then later Professor Farnsworth, to restore New New York and the rest of Earth, as well as the other planets in the universe.