Tanemon first digivolved to Palmon to protect Mimi from Kuwagamon. She later digivolved to Togemon when the Black-Gear-infected Monzaemon attacked them in Toy Town. Since then, she and Mimi have been good friends, but Palmon often tries to make Mimi appreciate what she has.

When the DigiDestined returned to the Real World to halt the plans of Myotismon, she digivolved to Lillymon when Mimi shed sincere tears for the well-being of her father when he tried to trip DarkTyrannomon in vain. Because of this new-found power, Lillymon became a needed ally in the battles against Myotismon, the Dark Masters and Apocalymon.