|Mega||RustTyrannomon (Burst Mode)|
The name "DemiTyrannomon" refers only to the Rookie form of this Digimon. Throughout the series, DemiTyrannomon gains the ability to digivolve into a number of more powerful forms, each with a different name and special attack. The Rookie level, however, is his preferred form and the one he spends most of his time in. It is also the name he is most commonly referred to.
DemiTyrannomon is Agumon's Rival with red skin black stripes and green spines.
- DemiTyranno Breath (Pico Flame): Shoots an orange and red fireball from his mouth.
- Claw Attack (Cross Fight): Slashes with claws.
Koromon is DemiTyrannomon's In-Training form.
While waiting for his partner, Botamon digivolves to this form on File Island. With the rest of the DigiDestined's Digimon, he plays with the Digivices until they disappear one day, heralding the arrival of their partners.
From then on, Koromon only appears when DemiTyrannomon uses too much energy by digivolving to his Ultimate or Mega forms.
Koromon is Agumon's In-Training Digivolution in Digimon Tamers: Brave Tamer, digivolving to him as he recovers from depleting his YP. His default technique is "San no Awa".
Tyrannomon is DemiTyrannomon's Champion form.
DemiTyrannomon first digivolves to Tyrannomon in a perfect mode. He defeats Seadramon with his fire blast.
RustTyrannomon is DemiTyrannomon's Mega form. He is more robotic and more cyberntic and his rivals is WarGreymon.
If DemiTyrannomon can warp digivolved into him.