Silphymon was first formed when Miyako, Hikari and Ken were trapped within the World of Darkness and attacked by a Blossomon, that was created by Archnemon. Hikari was too frightened to move but Miyako managed to snap her out of it and told her that as long they were friends, Hikari was safe. At that moment, the hearts of Miyako and Hikari were beating as one, causing their Digimon partners to merge. The newly formed Silphymon managed to destroy Blossomon and get everyone back into the regular Digital World. Silphymon eventually became a need to fight the likes of Archnemon, Mummymon and Black War Greymon. On the night of December 26, Silphymon fought Lady Devimon of the Demon Corps. Despite its promise to Miyako, Silphymon (with Aquilamon in control) killed Lady Devimon when she was going to kill Miyako. Silphymon was involved in the final battle with Belial Vamdemon.
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