Although it is not spoken, the name of the character-of-the-day in this episode is Umberto.
Ash's Pokédex refers to Kabuto as the Ancient Pokémon, as opposed to the Shellfish Pokémon.
This episode shows Kabuto's dormant form, only awakened due to a blood moon. This is the only time a fossil Pokémon is shown to have a dormant form.