Gotenks is a fusion of two younger characters, Goten and Trunks, with the two initially taking this form to take on Super Buu ...

Gogeta vs. Vegito—two fusion titans, but only one can be the strongest! Who wins the ultimate Dragon Ball fusion showdown?

The fusion of Goten and Trunks was a hyped up moment ... However, Gotenks' arrogance prevented him from getting a dominant victory over Buu despite outclassing the villain several times over.