Shellmon

Shellmon is second Digimon to battle DigiDestined after Kuwagamon. He is Champion Digimon.

Digimon Adventure

 * In The Birth of Greymon,
 * In Sea-Sick and Tired,

Digimon Adventure 02

 * In Old Reliable,
 * In Digimon World Tour, Part 2,
 * In A Million Points of Light,