He is voiced by Aoi Tada in Japanese version and Mona Marshall in English version, the latter of whom also voices different Terriermon from Digimon Tamers.
Terriermon is a lagomorph, resembling a white and green lop-eared rabbit with extraordinarily long floppy ears, and a single horn on his forehead.
Digimon: The Movie
Willis and Terriermon, who engages in a battle with Wendigomon, who keeps telling Willis to "go back," and loses. Willis and Terriermon journey to Colorado while Kari e-mails Davis Motomiya to inform him of Willis. The ride leaves without Willis and Davis, who encounter Wendigomon which leads to a battle between him, Flamedramon and Gargomon, Terriermon's Champion form.
Terriermon overhears the conversation (blaming it on his "really big ears") and offers to help. Willis refuses his help out of concern for his safety but Terriermon talks him into letting him. At Willis's home, Wendigomon reappears, as expected, but digivolves to Antylamon. He swiftly evades the attacks of Gargomon, Flamedramon, Halsemon and Digmon and throws all the Digimon around like rag dolls. Antylamon sinks into the lake (and changes the scenery), and rises again, but as Kerpymon. He then de-digivolves all the Digimon. However, they still try to fight, but to no avail, as Kerpymon grabs them and is about to eat them when Angemon and Angewomon cut off his arms and T.K. and Kari show up. Kerpymon changes the scenery again and de-ages the DigiDestined, revealing that he wanted Willis to "go back" in time to when the virus attacked him. Angewomon and Angemon digivolve to their Mega forms, Magnadramon and Seraphimon, to release two Golden Digi-Eggs for Willis and Davis. Veemon and Terriermon Golden Armor Digivolve to Magnamon and Rapidmon who get sucked into Kerpymon.
After saying goodbye to his new friends, Willis and Terriermon walk back home, and notice the Digi-Egg that will hatch into Conomon, Kokomon's Fresh form. It ends with Wendigomon dancing, and Willis comments that he is tone deaf.